64976797 has 2 divisors, whose sum is σ = 64976798. Its totient is φ = 64976796.

The previous prime is 64976783. The next prime is 64976831. The reversal of 64976797 is 79767946.

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., 39363076 + 25613721 = 6274^2 + 5061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64976797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64976777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32488398 + 32488399.

It is an arithmetic number, because the mean of its divisors is an integer number (32488399).

Almost surely, 2^64976797 is an apocalyptic number.

It is an amenable number.

64976797 is a deficient number, since it is larger than the sum of its proper divisors (1).

64976797 is an equidigital number, since it uses as much as digits as its factorization.

64976797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 55.

The square root of 64976797 is about 8060.8186308836. The cubic root of 64976797 is about 402.0247276523.

The spelling of 64976797 in words is "sixty-four million, nine hundred seventy-six thousand, seven hundred ninety-seven".