64724573 has 2 divisors, whose sum is σ = 64724574. Its totient is φ = 64724572.

The previous prime is 64724533. The next prime is 64724587. The reversal of 64724573 is 37542746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60871204 + 3853369 = 7802^2 + 1963^2 .

It is a cyclic number.

It is not a de Polignac number, because 64724573 - 2⁶ = 64724509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64724533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32362286 + 32362287.

It is an arithmetic number, because the mean of its divisors is an integer number (32362287).

Almost surely, 2^64724573 is an apocalyptic number.

It is an amenable number.

64724573 is a deficient number, since it is larger than the sum of its proper divisors (1).

64724573 is an equidigital number, since it uses as much as digits as its factorization.

64724573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 38.

The square root of 64724573 is about 8045.1583576708. The cubic root of 64724573 is about 401.5038659655.

The spelling of 64724573 in words is "sixty-four million, seven hundred twenty-four thousand, five hundred seventy-three".