671125857 has 4 divisors (see below), whose sum is σ = 894834480. Its totient is φ = 447417236.

The previous prime is 671125853. The next prime is 671125877. The reversal of 671125857 is 758521176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671125857 - 2² = 671125853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671125853) 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, 111854307 + ... + 111854312.

It is an arithmetic number, because the mean of its divisors is an integer number (223708620).

Almost surely, 2^671125857 is an apocalyptic number.

It is an amenable number.

671125857 is a deficient number, since it is larger than the sum of its proper divisors (223708623).

671125857 is a wasteful number, since it uses less digits than its factorization.

671125857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223708622.

The product of its digits is 117600, while the sum is 42.

The square root of 671125857 is about 25906.0969078709. The cubic root of 671125857 is about 875.5238689327.

The spelling of 671125857 in words is "six hundred seventy-one million, one hundred twenty-five thousand, eight hundred fifty-seven".