851490771 has 8 divisors (see below), whose sum is σ = 1137339840. Its totient is φ = 566651112.

The previous prime is 851490769. The next prime is 851490791. The reversal of 851490771 is 177094158.

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

It is not a de Polignac number, because 851490771 - 2¹ = 851490769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851490791) 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, 250381 + ... + 253758.

It is an arithmetic number, because the mean of its divisors is an integer number (142167480).

Almost surely, 2^851490771 is an apocalyptic number.

851490771 is a deficient number, since it is larger than the sum of its proper divisors (285849069).

851490771 is a wasteful number, since it uses less digits than its factorization.

851490771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504705.

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 851490771 is about 29180.3147858278. The cubic root of 851490771 is about 947.8217019895.

The spelling of 851490771 in words is "eight hundred fifty-one million, four hundred ninety thousand, seven hundred seventy-one".