32644681 has 2 divisors, whose sum is σ = 32644682. Its totient is φ = 32644680.

The previous prime is 32644663. The next prime is 32644687. The reversal of 32644681 is 18644623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23853456 + 8791225 = 4884^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 32644681 - 2¹³ = 32636489 is a prime.

It is a super-2 number, since 2×32644681² = 2131350395183522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32644687) 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 as a sum of consecutive naturals, namely, 16322340 + 16322341.

It is an arithmetic number, because the mean of its divisors is an integer number (16322341).

Almost surely, 2^32644681 is an apocalyptic number.

It is an amenable number.

32644681 is a deficient number, since it is larger than the sum of its proper divisors (1).

32644681 is an equidigital number, since it uses as much as digits as its factorization.

32644681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 32644681 is about 5713.5523975894. The cubic root of 32644681 is about 319.5980663290.

The spelling of 32644681 in words is "thirty-two million, six hundred forty-four thousand, six hundred eighty-one".