75921431 has 2 divisors, whose sum is σ = 75921432. Its totient is φ = 75921430.

The previous prime is 75921421. The next prime is 75921437. The reversal of 75921431 is 13412957.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75921431 is a prime.

It is a super-2 number, since 2×75921431² = 11528127370175522, which contains 22 as substring.

It is equal to p_4445258 and since 75921431 and 4445258 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75921437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37960715 + 37960716.

It is an arithmetic number, because the mean of its divisors is an integer number (37960716).

Almost surely, 2^75921431 is an apocalyptic number.

75921431 is a deficient number, since it is larger than the sum of its proper divisors (1).

75921431 is an equidigital number, since it uses as much as digits as its factorization.

75921431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 75921431 is about 8713.2904806393. The cubic root of 75921431 is about 423.4363412440.

The spelling of 75921431 in words is "seventy-five million, nine hundred twenty-one thousand, four hundred thirty-one".