64375769 has 2 divisors, whose sum is σ = 64375770. Its totient is φ = 64375768.

The previous prime is 64375763. The next prime is 64375777. The reversal of 64375769 is 96757346.

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., 64000000 + 375769 = 8000^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 64375769 - 2⁸ = 64375513 is a prime.

It is a super-2 number, since 2×64375769² = 8288479268682722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64375763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32187884 + 32187885.

It is an arithmetic number, because the mean of its divisors is an integer number (32187885).

Almost surely, 2^64375769 is an apocalyptic number.

It is an amenable number.

64375769 is a deficient number, since it is larger than the sum of its proper divisors (1).

64375769 is an equidigital number, since it uses as much as digits as its factorization.

64375769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 47.

The square root of 64375769 is about 8023.4511901052. The cubic root of 64375769 is about 400.7813249181.

It can be divided in two parts, 64 and 375769, that multiplied together give a square (24049216 = 4904²).

The spelling of 64375769 in words is "sixty-four million, three hundred seventy-five thousand, seven hundred sixty-nine".