32973921 has 12 divisors (see below), whose sum is σ = 47739172. Its totient is φ = 21931776.

The previous prime is 32973907. The next prime is 32973943. The reversal of 32973921 is 12937923.

It can be written as a sum of positive squares in 2 ways, for example, as 24206400 + 8767521 = 4920^2 + 2961^2 .

It is not a de Polignac number, because 32973921 - 2¹⁴ = 32957537 is a prime.

It is a super-2 number, since 2×32973921² = 2174558932228482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32973901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105 + ... + 8121.

Almost surely, 2^32973921 is an apocalyptic number.

It is an amenable number.

32973921 is a deficient number, since it is larger than the sum of its proper divisors (14765251).

32973921 is a wasteful number, since it uses less digits than its factorization.

32973921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8480 (or 8477 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 32973921 is about 5742.2923123087. The cubic root of 32973921 is about 320.6689165019.

The spelling of 32973921 in words is "thirty-two million, nine hundred seventy-three thousand, nine hundred twenty-one".