64464893 has 4 divisors (see below), whose sum is σ = 64589148. Its totient is φ = 64340640.

The previous prime is 64464887. The next prime is 64464899. The reversal of 64464893 is 39846446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39846446 = 2 ⋅19923223.

It is an interprime number because it is at equal distance from previous prime (64464887) and next prime (64464899).

It can be written as a sum of positive squares in 2 ways, for example, as 36024004 + 28440889 = 6002^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 64464893 - 2¹⁴ = 64448509 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 (64464899) 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, 61346 + ... + 62387.

It is an arithmetic number, because the mean of its divisors is an integer number (16147287).

Almost surely, 2^64464893 is an apocalyptic number.

It is an amenable number.

64464893 is a deficient number, since it is larger than the sum of its proper divisors (124255).

64464893 is a wasteful number, since it uses less digits than its factorization.

64464893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124254.

The product of its digits is 497664, while the sum is 44.

The square root of 64464893 is about 8029.0032382606. The cubic root of 64464893 is about 400.9661913897.

The spelling of 64464893 in words is "sixty-four million, four hundred sixty-four thousand, eight hundred ninety-three".