64797591 has 8 divisors (see below), whose sum is σ = 91479024. Its totient is φ = 40657280.

The previous prime is 64797587. The next prime is 64797599. The reversal of 64797591 is 19579746.

It is a happy number.

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 64797591 - 2² = 64797587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64797591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64797599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635220 + ... + 635321.

It is an arithmetic number, because the mean of its divisors is an integer number (11434878).

Almost surely, 2^64797591 is an apocalyptic number.

64797591 is a deficient number, since it is larger than the sum of its proper divisors (26681433).

64797591 is a wasteful number, since it uses less digits than its factorization.

64797591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270561.

The product of its digits is 476280, while the sum is 48.

The square root of 64797591 is about 8049.6950873931. The cubic root of 64797591 is about 401.6547926297.

The spelling of 64797591 in words is "sixty-four million, seven hundred ninety-seven thousand, five hundred ninety-one".