64426793 has 2 divisors, whose sum is σ = 64426794. Its totient is φ = 64426792.

The previous prime is 64426781. The next prime is 64426811. The reversal of 64426793 is 39762446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 24522304 = 6317^2 + 4952^2 .

It is a cyclic number.

It is not a de Polignac number, because 64426793 - 2⁶ = 64426729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64426793.

It is not a weakly prime, because it can be changed into another prime (64426723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32213396 + 32213397.

It is an arithmetic number, because the mean of its divisors is an integer number (32213397).

Almost surely, 2^64426793 is an apocalyptic number.

It is an amenable number.

64426793 is a deficient number, since it is larger than the sum of its proper divisors (1).

64426793 is an equidigital number, since it uses as much as digits as its factorization.

64426793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 41.

The square root of 64426793 is about 8026.6302393969. The cubic root of 64426793 is about 400.8871828948.

The spelling of 64426793 in words is "sixty-four million, four hundred twenty-six thousand, seven hundred ninety-three".