872996409 has 6 divisors (see below), whose sum is σ = 1260994826. Its totient is φ = 581997600.

The previous prime is 872996387. The next prime is 872996413. The reversal of 872996409 is 904699278.

It can be written as a sum of positive squares in only one way, i.e., 791184384 + 81812025 = 28128^2 + 9045^2 .

It is not a de Polignac number, because 872996409 - 2⁸ = 872996153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872996909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48499792 + ... + 48499809.

Almost surely, 2^872996409 is an apocalyptic number.

It is an amenable number.

872996409 is a deficient number, since it is larger than the sum of its proper divisors (387998417).

872996409 is a wasteful number, since it uses less digits than its factorization.

872996409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96999607 (or 96999604 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 872996409 is about 29546.5126368578. The cubic root of 872996409 is about 955.7349893198.

The spelling of 872996409 in words is "eight hundred seventy-two million, nine hundred ninety-six thousand, four hundred nine".