64233689 has 12 divisors (see below), whose sum is σ = 69988716. Its totient is φ = 58949904.

The previous prime is 64233619. The next prime is 64233709. The reversal of 64233689 is 98633246.

It can be written as a sum of positive squares in 6 ways, for example, as 64080025 + 153664 = 8005^2 + 392^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64233689 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 (64233619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371207 + ... + 371379.

It is an arithmetic number, because the mean of its divisors is an integer number (5832393).

Almost surely, 2^64233689 is an apocalyptic number.

It is an amenable number.

64233689 is a deficient number, since it is larger than the sum of its proper divisors (5755027).

64233689 is an frugal number, since it uses more digits than its factorization.

64233689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 186 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 64233689 is about 8014.5922541325. The cubic root of 64233689 is about 400.4862607201.

The spelling of 64233689 in words is "sixty-four million, two hundred thirty-three thousand, six hundred eighty-nine".