64373857 has 2 divisors, whose sum is σ = 64373858. Its totient is φ = 64373856.

The previous prime is 64373839. The next prime is 64373891. The reversal of 64373857 is 75837346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60824401 + 3549456 = 7799^2 + 1884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64373857 is a prime.

It is not a weakly prime, because it can be changed into another prime (64373807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32186928 + 32186929.

It is an arithmetic number, because the mean of its divisors is an integer number (32186929).

Almost surely, 2^64373857 is an apocalyptic number.

It is an amenable number.

64373857 is a deficient number, since it is larger than the sum of its proper divisors (1).

64373857 is an equidigital number, since it uses as much as digits as its factorization.

64373857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 43.

The square root of 64373857 is about 8023.3320384987. The cubic root of 64373857 is about 400.7773570614. Note that the first 3 decimals are identical.

The spelling of 64373857 in words is "sixty-four million, three hundred seventy-three thousand, eight hundred fifty-seven".