851172859 has 8 divisors (see below), whose sum is σ = 879016320. Its totient is φ = 823353600.

The previous prime is 851172853. The next prime is 851172863. The reversal of 851172859 is 958271158.

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 851172859 - 2⁹ = 851172347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851172853) 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, 89757 + ... + 98785.

It is an arithmetic number, because the mean of its divisors is an integer number (109877040).

Almost surely, 2^851172859 is an apocalyptic number.

851172859 is a deficient number, since it is larger than the sum of its proper divisors (27843461).

851172859 is a wasteful number, since it uses less digits than its factorization.

851172859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12101.

The product of its digits is 201600, while the sum is 46.

The square root of 851172859 is about 29174.8669062945. The cubic root of 851172859 is about 947.7037279564.

The spelling of 851172859 in words is "eight hundred fifty-one million, one hundred seventy-two thousand, eight hundred fifty-nine".