64894757 has 2 divisors, whose sum is σ = 64894758. Its totient is φ = 64894756.

The previous prime is 64894727. The next prime is 64894771. The reversal of 64894757 is 75749846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63457156 + 1437601 = 7966^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 64894757 - 2⁶ = 64894693 is a prime.

It is a super-2 number, since 2×64894757² = 8422658972178098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64894717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32447378 + 32447379.

It is an arithmetic number, because the mean of its divisors is an integer number (32447379).

Almost surely, 2^64894757 is an apocalyptic number.

It is an amenable number.

64894757 is a deficient number, since it is larger than the sum of its proper divisors (1).

64894757 is an equidigital number, since it uses as much as digits as its factorization.

64894757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 64894757 is about 8055.7282104103. The cubic root of 64894757 is about 401.8554569739.

The spelling of 64894757 in words is "sixty-four million, eight hundred ninety-four thousand, seven hundred fifty-seven".