64304813 has 2 divisors, whose sum is σ = 64304814. Its totient is φ = 64304812.

The previous prime is 64304809. The next prime is 64304837. The reversal of 64304813 is 31840346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60871204 + 3433609 = 7802^2 + 1853^2 .

It is a cyclic number.

It is not a de Polignac number, because 64304813 - 2² = 64304809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64304843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32152406 + 32152407.

It is an arithmetic number, because the mean of its divisors is an integer number (32152407).

Almost surely, 2^64304813 is an apocalyptic number.

It is an amenable number.

64304813 is a deficient number, since it is larger than the sum of its proper divisors (1).

64304813 is an equidigital number, since it uses as much as digits as its factorization.

64304813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 64304813 is about 8019.0281830157. The cubic root of 64304813 is about 400.6340215939.

The spelling of 64304813 in words is "sixty-four million, three hundred four thousand, eight hundred thirteen".