74771731 has 2 divisors, whose sum is σ = 74771732. Its totient is φ = 74771730.

The previous prime is 74771693. The next prime is 74771737. The reversal of 74771731 is 13717747.

It is a strong prime.

It is an emirp because it is prime and its reverse (13717747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74771731 - 2⁷ = 74771603 is a prime.

It is a super-2 number, since 2×74771731² = 11181623513472722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74771737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37385865 + 37385866.

It is an arithmetic number, because the mean of its divisors is an integer number (37385866).

Almost surely, 2^74771731 is an apocalyptic number.

74771731 is a deficient number, since it is larger than the sum of its proper divisors (1).

74771731 is an equidigital number, since it uses as much as digits as its factorization.

74771731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28812, while the sum is 37.

The square root of 74771731 is about 8647.0648777490. The cubic root of 74771731 is about 421.2880544536.

The spelling of 74771731 in words is "seventy-four million, seven hundred seventy-one thousand, seven hundred thirty-one".