64797689 has 8 divisors (see below), whose sum is σ = 72332832. Its totient is φ = 57536640.

The previous prime is 64797673. The next prime is 64797713. The reversal of 64797689 is 98679746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64797689 - 2⁴ = 64797673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64797289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68024 + ... + 68969.

It is an arithmetic number, because the mean of its divisors is an integer number (9041604).

Almost surely, 2^64797689 is an apocalyptic number.

It is an amenable number.

64797689 is a deficient number, since it is larger than the sum of its proper divisors (7535143).

64797689 is a wasteful number, since it uses less digits than its factorization.

64797689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137047.

The product of its digits is 4572288, while the sum is 56.

The square root of 64797689 is about 8049.7011745778. The cubic root of 64797689 is about 401.6549951174.

The spelling of 64797689 in words is "sixty-four million, seven hundred ninety-seven thousand, six hundred eighty-nine".