74818631 has 2 divisors, whose sum is σ = 74818632. Its totient is φ = 74818630.

The previous prime is 74818619. The next prime is 74818633. The reversal of 74818631 is 13681847.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74818631 - 2⁶ = 74818567 is a prime.

It is a super-2 number, since 2×74818631² = 11195655089428322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 74818633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74818633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37409315 + 37409316.

It is an arithmetic number, because the mean of its divisors is an integer number (37409316).

Almost surely, 2^74818631 is an apocalyptic number.

74818631 is a deficient number, since it is larger than the sum of its proper divisors (1).

74818631 is an equidigital number, since it uses as much as digits as its factorization.

74818631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 74818631 is about 8649.7763554904. The cubic root of 74818631 is about 421.3761192869.

The spelling of 74818631 in words is "seventy-four million, eight hundred eighteen thousand, six hundred thirty-one".