64517983 has 2 divisors, whose sum is σ = 64517984. Its totient is φ = 64517982.

The previous prime is 64517963. The next prime is 64517987. The reversal of 64517983 is 38971546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64517983 - 2¹⁷ = 64386911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64517987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32258991 + 32258992.

It is an arithmetic number, because the mean of its divisors is an integer number (32258992).

Almost surely, 2^64517983 is an apocalyptic number.

64517983 is a deficient number, since it is larger than the sum of its proper divisors (1).

64517983 is an equidigital number, since it uses as much as digits as its factorization.

64517983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 64517983 is about 8032.3086967571. The cubic root of 64517983 is about 401.0762329595.

The spelling of 64517983 in words is "sixty-four million, five hundred seventeen thousand, nine hundred eighty-three".