Search a number
-
+
2108882389 = 2939717551
BaseRepresentation
bin111110110110010…
…1111110111010101
312102222020022210011
41331230233313111
513304333214024
6545132400221
7103155130105
oct17554576725
95388208704
102108882389
11992455609
124aa316071
13277baab03
1416011d205
15c521e094
hex7db2fdd5

2108882389 has 4 divisors (see below), whose sum is σ = 2109602880. Its totient is φ = 2108161900.

The previous prime is 2108882387. The next prime is 2108882393. The reversal of 2108882389 is 9832888012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2108882389 - 21 = 2108882387 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108882383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355837 + ... + 361714.

It is an arithmetic number, because the mean of its divisors is an integer number (527400720).

Almost surely, 22108882389 is an apocalyptic number.

It is an amenable number.

2108882389 is a deficient number, since it is larger than the sum of its proper divisors (720491).

2108882389 is an equidigital number, since it uses as much as digits as its factorization.

2108882389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720490.

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 2108882389 is about 45922.5694947484. The cubic root of 2108882389 is about 1282.3821178099.

The spelling of 2108882389 in words is "two billion, one hundred eight million, eight hundred eighty-two thousand, three hundred eighty-nine".

Divisors: 1 2939 717551 2108882389