32638649 has 2 divisors, whose sum is σ = 32638650. Its totient is φ = 32638648.

The previous prime is 32638643. The next prime is 32638651. The reversal of 32638649 is 94683623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 12996025 = 4432^2 + 3605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32638649 is a prime.

Together with 32638651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32638643) 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, 16319324 + 16319325.

It is an arithmetic number, because the mean of its divisors is an integer number (16319325).

Almost surely, 2^32638649 is an apocalyptic number.

It is an amenable number.

32638649 is a deficient number, since it is larger than the sum of its proper divisors (1).

32638649 is an equidigital number, since it uses as much as digits as its factorization.

32638649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 32638649 is about 5713.0245054612. The cubic root of 32638649 is about 319.5783802809.

The spelling of 32638649 in words is "thirty-two million, six hundred thirty-eight thousand, six hundred forty-nine".