64793563 has 2 divisors, whose sum is σ = 64793564. Its totient is φ = 64793562.

The previous prime is 64793501. The next prime is 64793593. The reversal of 64793563 is 36539746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64793563 is a prime.

It is not a weakly prime, because it can be changed into another prime (64793593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32396781 + 32396782.

It is an arithmetic number, because the mean of its divisors is an integer number (32396782).

Almost surely, 2^64793563 is an apocalyptic number.

64793563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64793563 is an equidigital number, since it uses as much as digits as its factorization.

64793563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 43.

The square root of 64793563 is about 8049.4448876926. Note that the first 3 decimals coincide. The cubic root of 64793563 is about 401.6464697944.

It can be divided in two parts, 64793 and 563, that added together give a palindrome (65356).

The spelling of 64793563 in words is "sixty-four million, seven hundred ninety-three thousand, five hundred sixty-three".