64728793 has 2 divisors, whose sum is σ = 64728794. Its totient is φ = 64728792.

The previous prime is 64728757. The next prime is 64728857. The reversal of 64728793 is 39782746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64593369 + 135424 = 8037^2 + 368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64728793 is a prime.

It is not a weakly prime, because it can be changed into another prime (64728733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32364396 + 32364397.

It is an arithmetic number, because the mean of its divisors is an integer number (32364397).

Almost surely, 2^64728793 is an apocalyptic number.

It is an amenable number.

64728793 is a deficient number, since it is larger than the sum of its proper divisors (1).

64728793 is an equidigital number, since it uses as much as digits as its factorization.

64728793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 64728793 is about 8045.4206229382. The cubic root of 64728793 is about 401.5125917060.

The spelling of 64728793 in words is "sixty-four million, seven hundred twenty-eight thousand, seven hundred ninety-three".