64731413 has 2 divisors, whose sum is σ = 64731414. Its totient is φ = 64731412.

The previous prime is 64731409. The next prime is 64731449. The reversal of 64731413 is 31413746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46267204 + 18464209 = 6802^2 + 4297^2 .

It is a cyclic number.

It is not a de Polignac number, because 64731413 - 2² = 64731409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64731493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32365706 + 32365707.

It is an arithmetic number, because the mean of its divisors is an integer number (32365707).

Almost surely, 2^64731413 is an apocalyptic number.

It is an amenable number.

64731413 is a deficient number, since it is larger than the sum of its proper divisors (1).

64731413 is an equidigital number, since it uses as much as digits as its factorization.

64731413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 64731413 is about 8045.5834468359. The cubic root of 64731413 is about 401.5180089181.

The spelling of 64731413 in words is "sixty-four million, seven hundred thirty-one thousand, four hundred thirteen".