671925587 has 8 divisors (see below), whose sum is σ = 698403216. Its totient is φ = 645885792.

The previous prime is 671925577. The next prime is 671925601. The reversal of 671925587 is 785529176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671925587 - 2¹⁶ = 671860051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671925517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106328 + ... + 112469.

It is an arithmetic number, because the mean of its divisors is an integer number (87300402).

Almost surely, 2^671925587 is an apocalyptic number.

671925587 is a deficient number, since it is larger than the sum of its proper divisors (26477629).

671925587 is a wasteful number, since it uses less digits than its factorization.

671925587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218917.

The product of its digits is 1058400, while the sum is 50.

The square root of 671925587 is about 25921.5274819984. The cubic root of 671925587 is about 875.8714961137.

The spelling of 671925587 in words is "six hundred seventy-one million, nine hundred twenty-five thousand, five hundred eighty-seven".