856377 has 6 divisors (see below), whose sum is σ = 1237002. Its totient is φ = 570912.

The previous prime is 856369. The next prime is 856381. The reversal of 856377 is 773658.

It can be written as a sum of positive squares in only one way, i.e., 853776 + 2601 = 924^2 + 51^2 .

It is not a de Polignac number, because 856377 - 2³ = 856369 is a prime.

It is a super-2 number, since 2×856377² = 1466763132258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (856277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47568 + ... + 47585.

It is an arithmetic number, because the mean of its divisors is an integer number (206167).

2⁸⁵⁶³⁷⁷ is an apocalyptic number.

It is an amenable number.

856377 is a deficient number, since it is larger than the sum of its proper divisors (380625).

856377 is a wasteful number, since it uses less digits than its factorization.

856377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95159 (or 95156 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 856377 is about 925.4063972115. The cubic root of 856377 is about 94.9631251161.

The spelling of 856377 in words is "eight hundred fifty-six thousand, three hundred seventy-seven".