64464389 has 4 divisors (see below), whose sum is σ = 70324800. Its totient is φ = 58603980.

The previous prime is 64464383. The next prime is 64464409. The reversal of 64464389 is 98346446.

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 64464389 - 2⁸ = 64464133 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 (64464383) 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, 2930189 + ... + 2930210.

It is an arithmetic number, because the mean of its divisors is an integer number (17581200).

Almost surely, 2^64464389 is an apocalyptic number.

It is an amenable number.

64464389 is a deficient number, since it is larger than the sum of its proper divisors (5860411).

64464389 is a wasteful number, since it uses less digits than its factorization.

64464389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860410.

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

The square root of 64464389 is about 8028.9718519870. The cubic root of 64464389 is about 400.9651464412.

The spelling of 64464389 in words is "sixty-four million, four hundred sixty-four thousand, three hundred eighty-nine".