Search a number
-
+
10507387 = 11955217
BaseRepresentation
bin101000000101…
…010001111011
3201202211102111
4220011101323
510142214022
61013113151
7155211532
oct50052173
921684374
1010507387
115a273a0
1236287b7
13223b7b7
141577319
15dc8477
hexa0547b

10507387 has 4 divisors (see below), whose sum is σ = 11462616. Its totient is φ = 9552160.

The previous prime is 10507381. The next prime is 10507391. The reversal of 10507387 is 78370501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78370501 = 117124591.

It is a cyclic number.

It is not a de Polignac number, because 10507387 - 215 = 10474619 is a prime.

It is a super-2 number, since 2×105073872 = 220810363135538, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (10507381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477598 + ... + 477619.

It is an arithmetic number, because the mean of its divisors is an integer number (2865654).

Almost surely, 210507387 is an apocalyptic number.

10507387 is a deficient number, since it is larger than the sum of its proper divisors (955229).

10507387 is an equidigital number, since it uses as much as digits as its factorization.

10507387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955228.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 10507387 is about 3241.5099876446. The cubic root of 10507387 is about 219.0272965566.

Adding to 10507387 its reverse (78370501), we get a palindrome (88877888).

The spelling of 10507387 in words is "ten million, five hundred seven thousand, three hundred eighty-seven".

Divisors: 1 11 955217 10507387