973329921 has 12 divisors (see below), whose sum is σ = 1412063380. Its totient is φ = 646051680.

The previous prime is 973329911. The next prime is 973329923. The reversal of 973329921 is 129923379.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 399200400 + 574129521 = 19980^2 + 23961^2 .

It is not a de Polignac number, because 973329921 - 2⁶ = 973329857 is a prime.

It is a super-2 number, since 2×973329921² = 1894742270227732482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (973329923) 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, 234070 + ... + 238191.

Almost surely, 2^973329921 is an apocalyptic number.

It is an amenable number.

973329921 is a deficient number, since it is larger than the sum of its proper divisors (438733459).

973329921 is a wasteful number, since it uses less digits than its factorization.

973329921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472496 (or 472493 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 973329921 is about 31198.2358635869. The cubic root of 973329921 is about 991.0297488594.

The spelling of 973329921 in words is "nine hundred seventy-three million, three hundred twenty-nine thousand, nine hundred twenty-one".