64632979 has 2 divisors, whose sum is σ = 64632980. Its totient is φ = 64632978.

The previous prime is 64632961. The next prime is 64632989. The reversal of 64632979 is 97923646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64632979 - 2⁹ = 64632467 is a prime.

It is not a weakly prime, because it can be changed into another prime (64632989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32316489 + 32316490.

It is an arithmetic number, because the mean of its divisors is an integer number (32316490).

Almost surely, 2^64632979 is an apocalyptic number.

64632979 is a deficient number, since it is larger than the sum of its proper divisors (1).

64632979 is an equidigital number, since it uses as much as digits as its factorization.

64632979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 46.

The square root of 64632979 is about 8039.4638502826. The cubic root of 64632979 is about 401.3143825158.

The spelling of 64632979 in words is "sixty-four million, six hundred thirty-two thousand, nine hundred seventy-nine".