899979637 has 4 divisors (see below), whose sum is σ = 920909440. Its totient is φ = 879049836.

The previous prime is 899979629. The next prime is 899979653. The reversal of 899979637 is 736979998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 736979998 = 2 ⋅368489999.

It is a cyclic number.

It is not a de Polignac number, because 899979637 - 2³ = 899979629 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 (899979607) 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, 10464837 + ... + 10464922.

It is an arithmetic number, because the mean of its divisors is an integer number (230227360).

Almost surely, 2^899979637 is an apocalyptic number.

It is an amenable number.

899979637 is a deficient number, since it is larger than the sum of its proper divisors (20929803).

899979637 is a wasteful number, since it uses less digits than its factorization.

899979637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929802.

The product of its digits is 46294416, while the sum is 67.

The square root of 899979637 is about 29999.6606147470. The cubic root of 899979637 is about 965.4821029728.

The spelling of 899979637 in words is "eight hundred ninety-nine million, nine hundred seventy-nine thousand, six hundred thirty-seven".