32279921 has 2 divisors, whose sum is σ = 32279922. Its totient is φ = 32279920.

The previous prime is 32279911. The next prime is 32279927. The reversal of 32279921 is 12997223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 2686321 = 5440^2 + 1639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32279921 is a prime.

It is not a weakly prime, because it can be changed into another prime (32279927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16139960 + 16139961.

It is an arithmetic number, because the mean of its divisors is an integer number (16139961).

Almost surely, 2^32279921 is an apocalyptic number.

It is an amenable number.

32279921 is a deficient number, since it is larger than the sum of its proper divisors (1).

32279921 is an equidigital number, since it uses as much as digits as its factorization.

32279921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 32279921 is about 5681.5421322032. The cubic root of 32279921 is about 318.4032468599.

The spelling of 32279921 in words is "thirty-two million, two hundred seventy-nine thousand, nine hundred twenty-one".