64797791 has 2 divisors, whose sum is σ = 64797792. Its totient is φ = 64797790.

The previous prime is 64797731. The next prime is 64797797. The reversal of 64797791 is 19779746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64797791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64797797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32398895 + 32398896.

It is an arithmetic number, because the mean of its divisors is an integer number (32398896).

Almost surely, 2^64797791 is an apocalyptic number.

64797791 is a deficient number, since it is larger than the sum of its proper divisors (1).

64797791 is an equidigital number, since it uses as much as digits as its factorization.

64797791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 50.

The square root of 64797791 is about 8049.7075102143. The cubic root of 64797791 is about 401.6552058697.

The spelling of 64797791 in words is "sixty-four million, seven hundred ninety-seven thousand, seven hundred ninety-one".