671497690 has 16 divisors (see below), whose sum is σ = 1209116160. Its totient is φ = 268505680.

The previous prime is 671497681. The next prime is 671497733. The reversal of 671497690 is 96794176.

It is a super-2 number, since 2×671497690² = 901818295350672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23595 + ... + 43585.

It is an arithmetic number, because the mean of its divisors is an integer number (75569760).

Almost surely, 2^671497690 is an apocalyptic number.

671497690 is a deficient number, since it is larger than the sum of its proper divisors (537618470).

671497690 is a wasteful number, since it uses less digits than its factorization.

671497690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23357.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 671497690 is about 25913.2724679844. The cubic root of 671497690 is about 875.6855318851.

The spelling of 671497690 in words is "six hundred seventy-one million, four hundred ninety-seven thousand, six hundred ninety".