64372769 has 2 divisors, whose sum is σ = 64372770. Its totient is φ = 64372768.

The previous prime is 64372757. The next prime is 64372783. The reversal of 64372769 is 96727346.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64192144 + 180625 = 8012^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 64372769 - 2⁴ = 64372753 is a prime.

It is a super-2 number, since 2×64372769² = 8287706777454722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64372739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32186384 + 32186385.

It is an arithmetic number, because the mean of its divisors is an integer number (32186385).

Almost surely, 2^64372769 is an apocalyptic number.

It is an amenable number.

64372769 is a deficient number, since it is larger than the sum of its proper divisors (1).

64372769 is an equidigital number, since it uses as much as digits as its factorization.

64372769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 44.

The square root of 64372769 is about 8023.2642359578. The cubic root of 64372769 is about 400.7750991664.

The spelling of 64372769 in words is "sixty-four million, three hundred seventy-two thousand, seven hundred sixty-nine".