74911931 has 2 divisors, whose sum is σ = 74911932. Its totient is φ = 74911930.

The previous prime is 74911913. The next prime is 74911933. The reversal of 74911931 is 13911947.

It is a happy number.

Together with previous prime (74911913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74911931 - 2¹⁰ = 74910907 is a prime.

It is a super-2 number, since 2×74911931² = 11223594812297522, which contains 22 as substring.

Together with 74911933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74911891 and 74911900.

It is not a weakly prime, because it can be changed into another prime (74911933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37455965 + 37455966.

It is an arithmetic number, because the mean of its divisors is an integer number (37455966).

Almost surely, 2^74911931 is an apocalyptic number.

74911931 is a deficient number, since it is larger than the sum of its proper divisors (1).

74911931 is an equidigital number, since it uses as much as digits as its factorization.

74911931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 74911931 is about 8655.1678782101. The cubic root of 74911931 is about 421.5512007286.

The spelling of 74911931 in words is "seventy-four million, nine hundred eleven thousand, nine hundred thirty-one".