74605631 has 2 divisors, whose sum is σ = 74605632. Its totient is φ = 74605630.

The previous prime is 74605621. The next prime is 74605667. The reversal of 74605631 is 13650647.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74605631 - 2⁶ = 74605567 is a prime.

It is a super-2 number, since 2×74605631² = 11132000353816322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74605621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37302815 + 37302816.

It is an arithmetic number, because the mean of its divisors is an integer number (37302816).

Almost surely, 2^74605631 is an apocalyptic number.

74605631 is a deficient number, since it is larger than the sum of its proper divisors (1).

74605631 is an equidigital number, since it uses as much as digits as its factorization.

74605631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 74605631 is about 8637.4551228935. The cubic root of 74605631 is about 420.9758695121.

The spelling of 74605631 in words is "seventy-four million, six hundred five thousand, six hundred thirty-one".