64409573 has 2 divisors, whose sum is σ = 64409574. Its totient is φ = 64409572.

The previous prime is 64409561. The next prime is 64409623. The reversal of 64409573 is 37590446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60730849 + 3678724 = 7793^2 + 1918^2 .

It is a cyclic number.

It is not a de Polignac number, because 64409573 - 2⁴ = 64409557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64409173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32204786 + 32204787.

It is an arithmetic number, because the mean of its divisors is an integer number (32204787).

Almost surely, 2^64409573 is an apocalyptic number.

It is an amenable number.

64409573 is a deficient number, since it is larger than the sum of its proper divisors (1).

64409573 is an equidigital number, since it uses as much as digits as its factorization.

64409573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 64409573 is about 8025.5574884241. The cubic root of 64409573 is about 400.8514633228.

The spelling of 64409573 in words is "sixty-four million, four hundred nine thousand, five hundred seventy-three".