64773913 has 2 divisors, whose sum is σ = 64773914. Its totient is φ = 64773912.

The previous prime is 64773899. The next prime is 64773941. The reversal of 64773913 is 31937746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64048009 + 725904 = 8003^2 + 852^2 .

It is a cyclic number.

It is not a de Polignac number, because 64773913 - 2⁵ = 64773881 is a prime.

It is not a weakly prime, because it can be changed into another prime (64783913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32386956 + 32386957.

It is an arithmetic number, because the mean of its divisors is an integer number (32386957).

Almost surely, 2^64773913 is an apocalyptic number.

It is an amenable number.

64773913 is a deficient number, since it is larger than the sum of its proper divisors (1).

64773913 is an equidigital number, since it uses as much as digits as its factorization.

64773913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The square root of 64773913 is about 8048.2242140736. The cubic root of 64773913 is about 401.6058631315.

The spelling of 64773913 in words is "sixty-four million, seven hundred seventy-three thousand, nine hundred thirteen".