64560493 has 2 divisors, whose sum is σ = 64560494. Its totient is φ = 64560492.

The previous prime is 64560481. The next prime is 64560521. The reversal of 64560493 is 39406546.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61748164 + 2812329 = 7858^2 + 1677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64560493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64560443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32280246 + 32280247.

It is an arithmetic number, because the mean of its divisors is an integer number (32280247).

Almost surely, 2^64560493 is an apocalyptic number.

It is an amenable number.

64560493 is a deficient number, since it is larger than the sum of its proper divisors (1).

64560493 is an equidigital number, since it uses as much as digits as its factorization.

64560493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 64560493 is about 8034.9544491553. The cubic root of 64560493 is about 401.1643014671.

The spelling of 64560493 in words is "sixty-four million, five hundred sixty thousand, four hundred ninety-three".