872399577 has 16 divisors (see below), whose sum is σ = 1356502400. Its totient is φ = 498513456.

The previous prime is 872399543. The next prime is 872399617. The reversal of 872399577 is 775993278.

It is not a de Polignac number, because 872399577 - 2⁶ = 872399513 is a prime.

It is a super-2 number, since 2×872399577² = 1522162043899557858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872399537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422878 + ... + 424935.

It is an arithmetic number, because the mean of its divisors is an integer number (84781400).

Almost surely, 2^872399577 is an apocalyptic number.

It is an amenable number.

872399577 is a deficient number, since it is larger than the sum of its proper divisors (484102823).

872399577 is an equidigital number, since it uses as much as digits as its factorization.

872399577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847837 (or 847823 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 57.

The square root of 872399577 is about 29536.4110379037. The cubic root of 872399577 is about 955.5171406712.

The spelling of 872399577 in words is "eight hundred seventy-two million, three hundred ninety-nine thousand, five hundred seventy-seven".