851136087 has 8 divisors (see below), whose sum is σ = 1136362240. Its totient is φ = 566667000.

The previous prime is 851136079. The next prime is 851136089. The reversal of 851136087 is 780631158.

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

It is not a de Polignac number, because 851136087 - 2³ = 851136079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851136089) 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, 186637 + ... + 191142.

It is an arithmetic number, because the mean of its divisors is an integer number (142045280).

Almost surely, 2^851136087 is an apocalyptic number.

851136087 is a deficient number, since it is larger than the sum of its proper divisors (285226153).

851136087 is a wasteful number, since it uses less digits than its factorization.

851136087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378533.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 851136087 is about 29174.2366995265. The cubic root of 851136087 is about 947.6900803316.

The spelling of 851136087 in words is "eight hundred fifty-one million, one hundred thirty-six thousand, eighty-seven".