75607381 has 4 divisors (see below), whose sum is σ = 80054892. Its totient is φ = 71159872.

The previous prime is 75607319. The next prime is 75607409. The reversal of 75607381 is 18370657.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58384881 + 17222500 = 7641^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 75607381 - 2¹⁵ = 75574613 is a prime.

It is a super-2 number, since 2×75607381² = 11432952123358322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75607381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75607681) 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, 2223730 + ... + 2223763.

It is an arithmetic number, because the mean of its divisors is an integer number (20013723).

Almost surely, 2^75607381 is an apocalyptic number.

It is an amenable number.

75607381 is a deficient number, since it is larger than the sum of its proper divisors (4447511).

75607381 is a wasteful number, since it uses less digits than its factorization.

75607381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447510.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 75607381 is about 8695.2504851787. The cubic root of 75607381 is about 422.8516843523.

It can be divided in two parts, 7560 and 7381, that added together give a palindrome (14941).

The spelling of 75607381 in words is "seventy-five million, six hundred seven thousand, three hundred eighty-one".