32716921 has 4 divisors (see below), whose sum is σ = 33165172. Its totient is φ = 32268672.

The previous prime is 32716919. The next prime is 32716927. The reversal of 32716921 is 12961723.

32716921 = 399² + 400² + ... + 544².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 12816400 = 4461^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 32716921 - 2¹ = 32716919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32716927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224016 + ... + 224161.

It is an arithmetic number, because the mean of its divisors is an integer number (8291293).

Almost surely, 2^32716921 is an apocalyptic number.

It is an amenable number.

32716921 is a deficient number, since it is larger than the sum of its proper divisors (448251).

32716921 is an equidigital number, since it uses as much as digits as its factorization.

32716921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448250.

The product of its digits is 4536, while the sum is 31.

The square root of 32716921 is about 5719.8707153222. The cubic root of 32716921 is about 319.8336407429.

The spelling of 32716921 in words is "thirty-two million, seven hundred sixteen thousand, nine hundred twenty-one".