872399 has 4 divisors (see below), whose sum is σ = 951720. Its totient is φ = 793080.

The previous prime is 872393. The next prime is 872411. The reversal of 872399 is 993278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 872399 - 2⁴ = 872383 is a prime.

It is a super-2 number, since 2×872399² = 1522160030402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872393) 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, 39644 + ... + 39665.

It is an arithmetic number, because the mean of its divisors is an integer number (237930).

2⁸⁷²³⁹⁹ is an apocalyptic number.

872399 is a deficient number, since it is larger than the sum of its proper divisors (79321).

872399 is a wasteful number, since it uses less digits than its factorization.

872399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79320.

The product of its digits is 27216, while the sum is 38.

The square root of 872399 is about 934.0230189883. The cubic root of 872399 is about 95.5516930013.

The spelling of 872399 in words is "eight hundred seventy-two thousand, three hundred ninety-nine".