64716893 has 4 divisors (see below), whose sum is σ = 66948540. Its totient is φ = 62485248.

The previous prime is 64716889. The next prime is 64716919. The reversal of 64716893 is 39861746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20268004 + 44448889 = 4502^2 + 6667^2 .

It is a cyclic number.

It is not a de Polignac number, because 64716893 - 2² = 64716889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64716803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115780 + ... + 1115837.

It is an arithmetic number, because the mean of its divisors is an integer number (16737135).

Almost surely, 2^64716893 is an apocalyptic number.

It is an amenable number.

64716893 is a deficient number, since it is larger than the sum of its proper divisors (2231647).

64716893 is a wasteful number, since it uses less digits than its factorization.

64716893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231646.

The product of its digits is 217728, while the sum is 44.

The square root of 64716893 is about 8044.6810378038. The cubic root of 64716893 is about 401.4879849715.

The spelling of 64716893 in words is "sixty-four million, seven hundred sixteen thousand, eight hundred ninety-three".