75939431 has 4 divisors (see below), whose sum is σ = 77226600. Its totient is φ = 74652264.

The previous prime is 75939427. The next prime is 75939467. The reversal of 75939431 is 13493957.

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

It is a cyclic number.

It is not a de Polignac number, because 75939431 - 2² = 75939427 is a prime.

It is a super-2 number, since 2×75939431² = 11533594361207522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75939401) 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, 643496 + ... + 643613.

It is an arithmetic number, because the mean of its divisors is an integer number (19306650).

Almost surely, 2^75939431 is an apocalyptic number.

75939431 is a deficient number, since it is larger than the sum of its proper divisors (1287169).

75939431 is a wasteful number, since it uses less digits than its factorization.

75939431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287168.

The product of its digits is 102060, while the sum is 41.

The square root of 75939431 is about 8714.3233242748. The cubic root of 75939431 is about 423.4698023795.

The spelling of 75939431 in words is "seventy-five million, nine hundred thirty-nine thousand, four hundred thirty-one".