671919572 has 24 divisors (see below), whose sum is σ = 1239551040. Its totient is φ = 317813760.

The previous prime is 671919557. The next prime is 671919587. The reversal of 671919572 is 275919176.

It is an interprime number because it is at equal distance from previous prime (671919557) and next prime (671919587).

It is a super-2 number, since 2×671919572² = 902951822473326368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49172 + ... + 61332.

It is an arithmetic number, because the mean of its divisors is an integer number (51647960).

Almost surely, 2^671919572 is an apocalyptic number.

It is an amenable number.

671919572 is a deficient number, since it is larger than the sum of its proper divisors (567631468).

671919572 is a wasteful number, since it uses less digits than its factorization.

671919572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12911 (or 12909 counting only the distinct ones).

The product of its digits is 238140, while the sum is 47.

The square root of 671919572 is about 25921.4114584835. The cubic root of 671919572 is about 875.8688825392.

The spelling of 671919572 in words is "six hundred seventy-one million, nine hundred nineteen thousand, five hundred seventy-two".