74451631 has 2 divisors, whose sum is σ = 74451632. Its totient is φ = 74451630.

The previous prime is 74451589. The next prime is 74451647. The reversal of 74451631 is 13615447.

It is a strong prime.

It is an emirp because it is prime and its reverse (13615447) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74451631 is a prime.

It is a super-2 number, since 2×74451631² = 11086090717120322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74451593 and 74451602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74451131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37225815 + 37225816.

It is an arithmetic number, because the mean of its divisors is an integer number (37225816).

Almost surely, 2^74451631 is an apocalyptic number.

74451631 is a deficient number, since it is larger than the sum of its proper divisors (1).

74451631 is an equidigital number, since it uses as much as digits as its factorization.

74451631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 74451631 is about 8628.5358549409. The cubic root of 74451631 is about 420.6860122920.

The spelling of 74451631 in words is "seventy-four million, four hundred fifty-one thousand, six hundred thirty-one".