938070921 has 16 divisors (see below), whose sum is σ = 1262878848. Its totient is φ = 619344000.

The previous prime is 938070911. The next prime is 938070923. The reversal of 938070921 is 129070839.

It is not a de Polignac number, because 938070921 - 2⁹ = 938070409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 938070921.

It is not an unprimeable number, because it can be changed into a prime (938070923) 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, 186996 + ... + 191946.

It is an arithmetic number, because the mean of its divisors is an integer number (78929928).

Almost surely, 2^938070921 is an apocalyptic number.

It is an amenable number.

938070921 is a deficient number, since it is larger than the sum of its proper divisors (324807927).

938070921 is a wasteful number, since it uses less digits than its factorization.

938070921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 938070921 is about 30627.9434667103. The cubic root of 938070921 is about 978.9155437672.

The spelling of 938070921 in words is "nine hundred thirty-eight million, seventy thousand, nine hundred twenty-one".