75442931 has 4 divisors (see below), whose sum is σ = 75608472. Its totient is φ = 75277392.

The previous prime is 75442919. The next prime is 75442973. The reversal of 75442931 is 13924457.

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 75442931 - 2¹⁰ = 75441907 is a prime.

It is a super-2 number, since 2×75442931² = 11383271675741522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75442891 and 75442900.

It is not an unprimeable number, because it can be changed into a prime (75442531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82085 + ... + 82998.

It is an arithmetic number, because the mean of its divisors is an integer number (18902118).

Almost surely, 2^75442931 is an apocalyptic number.

75442931 is a deficient number, since it is larger than the sum of its proper divisors (165541).

75442931 is a wasteful number, since it uses less digits than its factorization.

75442931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165540.

The product of its digits is 30240, while the sum is 35.

The square root of 75442931 is about 8685.7890257593. The cubic root of 75442931 is about 422.5448869831.

The spelling of 75442931 in words is "seventy-five million, four hundred forty-two thousand, nine hundred thirty-one".