64959857 has 2 divisors, whose sum is σ = 64959858. Its totient is φ = 64959856.

The previous prime is 64959793. The next prime is 64959859. The reversal of 64959857 is 75895946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63616576 + 1343281 = 7976^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 64959857 - 2⁶ = 64959793 is a prime.

Together with 64959859, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64959799 and 64959808.

It is not a weakly prime, because it can be changed into another prime (64959859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32479928 + 32479929.

It is an arithmetic number, because the mean of its divisors is an integer number (32479929).

Almost surely, 2^64959857 is an apocalyptic number.

It is an amenable number.

64959857 is a deficient number, since it is larger than the sum of its proper divisors (1).

64959857 is an equidigital number, since it uses as much as digits as its factorization.

64959857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The square root of 64959857 is about 8059.7678006255. The cubic root of 64959857 is about 401.9897875346.

It can be divided in two parts, 649 and 59857, that added together give a palindrome (60506).

The spelling of 64959857 in words is "sixty-four million, nine hundred fifty-nine thousand, eight hundred fifty-seven".