9936374921 has 12 divisors (see below), whose sum is σ = 10924741296. Its totient is φ = 9030636120.

The previous prime is 9936374911. The next prime is 9936374983. The reversal of 9936374921 is 1294736399.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-9936374921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9936374911) 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, 562790 + ... + 580176.

It is an arithmetic number, because the mean of its divisors is an integer number (910395108).

Almost surely, 2^9936374921 is an apocalyptic number.

It is an amenable number.

9936374921 is a deficient number, since it is larger than the sum of its proper divisors (988366375).

9936374921 is a wasteful number, since it uses less digits than its factorization.

9936374921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22132 (or 22121 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 53.

The square root of 9936374921 is about 99681.3669699608. The cubic root of 9936374921 is about 2149.8557625249.

The spelling of 9936374921 in words is "nine billion, nine hundred thirty-six million, three hundred seventy-four thousand, nine hundred twenty-one".