674536257 has 6 divisors (see below), whose sum is σ = 974330162. Its totient is φ = 449690832.

The previous prime is 674536147. The next prime is 674536267. The reversal of 674536257 is 752635476.

674536257 is a `hidden beast` number, since 67 + 4 + 536 + 2 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 536802561 + 137733696 = 23169^2 + 11736^2 .

It is not a de Polignac number, because 674536257 - 2⁷ = 674536129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674536267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37474228 + ... + 37474245.

Almost surely, 2^674536257 is an apocalyptic number.

It is an amenable number.

674536257 is a deficient number, since it is larger than the sum of its proper divisors (299793905).

674536257 is a wasteful number, since it uses less digits than its factorization.

674536257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74948479 (or 74948476 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 674536257 is about 25971.8358419269. The cubic root of 674536257 is about 877.0043876252.

The spelling of 674536257 in words is "six hundred seventy-four million, five hundred thirty-six thousand, two hundred fifty-seven".