64724057 has 2 divisors, whose sum is σ = 64724058. Its totient is φ = 64724056.

The previous prime is 64724053. The next prime is 64724059. The reversal of 64724057 is 75042746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62425801 + 2298256 = 7901^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 64724057 - 2² = 64724053 is a prime.

Together with 64724059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64724053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32362028 + 32362029.

It is an arithmetic number, because the mean of its divisors is an integer number (32362029).

Almost surely, 2^64724057 is an apocalyptic number.

It is an amenable number.

64724057 is a deficient number, since it is larger than the sum of its proper divisors (1).

64724057 is an equidigital number, since it uses as much as digits as its factorization.

64724057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 64724057 is about 8045.1262886297. The cubic root of 64724057 is about 401.5027990006.

The spelling of 64724057 in words is "sixty-four million, seven hundred twenty-four thousand, fifty-seven".