64624493 has 2 divisors, whose sum is σ = 64624494. Its totient is φ = 64624492.

The previous prime is 64624481. The next prime is 64624513. The reversal of 64624493 is 39442646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57957769 + 6666724 = 7613^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 64624493 - 2⁴ = 64624477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64624423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32312246 + 32312247.

It is an arithmetic number, because the mean of its divisors is an integer number (32312247).

Almost surely, 2^64624493 is an apocalyptic number.

It is an amenable number.

64624493 is a deficient number, since it is larger than the sum of its proper divisors (1).

64624493 is an equidigital number, since it uses as much as digits as its factorization.

64624493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 38.

The square root of 64624493 is about 8038.9360614449. The cubic root of 64624493 is about 401.2968181962.

The spelling of 64624493 in words is "sixty-four million, six hundred twenty-four thousand, four hundred ninety-three".