674647531 has 4 divisors (see below), whose sum is σ = 683889352. Its totient is φ = 665405712.

The previous prime is 674647471. The next prime is 674647549. The reversal of 674647531 is 135746476.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 674647531 - 2¹⁵ = 674614763 is a prime.

It is a super-2 number, since 2×674647531² = 910298582168791922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674647591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4620801 + ... + 4620946.

It is an arithmetic number, because the mean of its divisors is an integer number (170972338).

Almost surely, 2^674647531 is an apocalyptic number.

674647531 is a deficient number, since it is larger than the sum of its proper divisors (9241821).

674647531 is an equidigital number, since it uses as much as digits as its factorization.

674647531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9241820.

The product of its digits is 423360, while the sum is 43.

The square root of 674647531 is about 25973.9779587186. The cubic root of 674647531 is about 877.0526096047.

The spelling of 674647531 in words is "six hundred seventy-four million, six hundred forty-seven thousand, five hundred thirty-one".