872357 has 4 divisors (see below), whose sum is σ = 893676. Its totient is φ = 851040.

The previous prime is 872353. The next prime is 872369. The reversal of 872357 is 753278.

It is a Cunningham number, because it is equal to 934²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 753278 = 2 ⋅376639.

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 829921 = 206^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 872357 - 2² = 872353 is a prime.

It is a super-2 number, since 2×872357² = 1522013470898, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 872357.

It is not an unprimeable number, because it can be changed into a prime (872351) 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, 10598 + ... + 10679.

It is an arithmetic number, because the mean of its divisors is an integer number (223419).

2⁸⁷²³⁵⁷ is an apocalyptic number.

It is an amenable number.

872357 is a deficient number, since it is larger than the sum of its proper divisors (21319).

872357 is a wasteful number, since it uses less digits than its factorization.

872357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21318.

The product of its digits is 11760, while the sum is 32.

The square root of 872357 is about 934.0005353318. Note that the first 3 decimals coincide. The cubic root of 872357 is about 95.5501595915.

The spelling of 872357 in words is "eight hundred seventy-two thousand, three hundred fifty-seven".