836257997 has 4 divisors (see below), whose sum is σ = 847713660. Its totient is φ = 824802336.

The previous prime is 836257957. The next prime is 836258041. The reversal of 836257997 is 799752638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799752638 = 2 ⋅399876319.

It can be written as a sum of positive squares in 2 ways, for example, as 508322116 + 327935881 = 22546^2 + 18109^2 .

It is a cyclic number.

It is not a de Polignac number, because 836257997 - 2²⁰ = 835209421 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 (836257957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5727722 + ... + 5727867.

It is an arithmetic number, because the mean of its divisors is an integer number (211928415).

Almost surely, 2^836257997 is an apocalyptic number.

It is an amenable number.

836257997 is a deficient number, since it is larger than the sum of its proper divisors (11455663).

836257997 is a wasteful number, since it uses less digits than its factorization.

836257997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11455662.

The product of its digits is 5715360, while the sum is 56.

The square root of 836257997 is about 28918.1257518533. The cubic root of 836257997 is about 942.1356290513.

The spelling of 836257997 in words is "eight hundred thirty-six million, two hundred fifty-seven thousand, nine hundred ninety-seven".