Search a number
-
+
75389417 = 191339409
BaseRepresentation
bin1000111111001…
…01100111101001
312020212011211122
410133211213221
5123244430132
611251505025
71603541135
oct437454751
9166764748
1075389417
1139612204
12212b8175
131280792c
14a0263c5
156942912
hex47e59e9

75389417 has 4 divisors (see below), whose sum is σ = 75430740. Its totient is φ = 75348096.

The previous prime is 75389383. The next prime is 75389429. The reversal of 75389417 is 71498357.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71498357 = 710214051.

It can be written as a sum of positive squares in 2 ways, for example, as 54449641 + 20939776 = 7379^2 + 4576^2 .

It is a cyclic number.

It is not a de Polignac number, because 75389417 - 210 = 75388393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75389477) 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, 17792 + ... + 21617.

It is an arithmetic number, because the mean of its divisors is an integer number (18857685).

Almost surely, 275389417 is an apocalyptic number.

It is an amenable number.

75389417 is a deficient number, since it is larger than the sum of its proper divisors (41323).

75389417 is a wasteful number, since it uses less digits than its factorization.

75389417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41322.

The product of its digits is 211680, while the sum is 44.

The square root of 75389417 is about 8682.7079301333. The cubic root of 75389417 is about 422.4449553069. Note that the first 3 decimals are identical.

The spelling of 75389417 in words is "seventy-five million, three hundred eighty-nine thousand, four hundred seventeen".

Divisors: 1 1913 39409 75389417