987972633 has 12 divisors (see below), whose sum is σ = 1479926448. Its totient is φ = 658648260.

The previous prime is 987972617. The next prime is 987972637. The reversal of 987972633 is 336279789.

It is not a de Polignac number, because 987972633 - 2⁴ = 987972617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987972633.

It is not an unprimeable number, because it can be changed into a prime (987972637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2032623 + ... + 2033108.

It is an arithmetic number, because the mean of its divisors is an integer number (123327204).

Almost surely, 2^987972633 is an apocalyptic number.

It is an amenable number.

987972633 is a deficient number, since it is larger than the sum of its proper divisors (491953815).

987972633 is an equidigital number, since it uses as much as digits as its factorization.

987972633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065746 (or 4065734 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 987972633 is about 31432.0319578611. The cubic root of 987972633 is about 995.9746963379.

The spelling of 987972633 in words is "nine hundred eighty-seven million, nine hundred seventy-two thousand, six hundred thirty-three".