856396965 has 8 divisors (see below), whose sum is σ = 1370235168. Its totient is φ = 456745040.

The previous prime is 856396963. The next prime is 856396967. The reversal of 856396965 is 569693658.

It is an interprime number because it is at equal distance from previous prime (856396963) and next prime (856396967).

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

It is not a de Polignac number, because 856396965 - 2¹ = 856396963 is a prime.

It is a super-2 number, since 2×856396965² = 1466831523322422450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856396963) 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, 28546551 + ... + 28546580.

It is an arithmetic number, because the mean of its divisors is an integer number (171279396).

Almost surely, 2^856396965 is an apocalyptic number.

It is an amenable number.

856396965 is a deficient number, since it is larger than the sum of its proper divisors (513838203).

856396965 is a wasteful number, since it uses less digits than its factorization.

856396965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57093139.

The product of its digits is 10497600, while the sum is 57.

The square root of 856396965 is about 29264.2608825167. The cubic root of 856396965 is about 949.6386307931.

The spelling of 856396965 in words is "eight hundred fifty-six million, three hundred ninety-six thousand, nine hundred sixty-five".