856903761 has 12 divisors (see below), whose sum is σ = 1414571392. Its totient is φ = 489659256.

The previous prime is 856903759. The next prime is 856903793. The reversal of 856903761 is 167309658.

It is a happy number.

It is not a de Polignac number, because 856903761 - 2¹ = 856903759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856903741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6800761 + ... + 6800886.

Almost surely, 2^856903761 is an apocalyptic number.

It is an amenable number.

856903761 is a deficient number, since it is larger than the sum of its proper divisors (557667631).

856903761 is a wasteful number, since it uses less digits than its factorization.

856903761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13601660 (or 13601657 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 856903761 is about 29272.9185596517. The cubic root of 856903761 is about 949.8259186105.

The spelling of 856903761 in words is "eight hundred fifty-six million, nine hundred three thousand, seven hundred sixty-one".