64393793 has 4 divisors (see below), whose sum is σ = 67782960. Its totient is φ = 61004628.

The previous prime is 64393759. The next prime is 64393817. The reversal of 64393793 is 39739346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64393793 - 2⁶ = 64393729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64393723) 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, 1694555 + ... + 1694592.

It is an arithmetic number, because the mean of its divisors is an integer number (16945740).

Almost surely, 2^64393793 is an apocalyptic number.

It is an amenable number.

64393793 is a deficient number, since it is larger than the sum of its proper divisors (3389167).

64393793 is a wasteful number, since it uses less digits than its factorization.

64393793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389166.

The product of its digits is 367416, while the sum is 44.

The square root of 64393793 is about 8024.5743189281. The cubic root of 64393793 is about 400.8187251628.

The spelling of 64393793 in words is "sixty-four million, three hundred ninety-three thousand, seven hundred ninety-three".