64233975 has 24 divisors (see below), whose sum is σ = 114371152. Its totient is φ = 31622400.

The previous prime is 64233947. The next prime is 64233977. The reversal of 64233975 is 57933246.

It is not a de Polignac number, because 64233975 - 2⁵ = 64233943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64233977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31966 + ... + 33915.

Almost surely, 2^64233975 is an apocalyptic number.

64233975 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64233975 is a deficient number, since it is larger than the sum of its proper divisors (50137177).

64233975 is a wasteful number, since it uses less digits than its factorization.

64233975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65907 (or 65902 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The square root of 64233975 is about 8014.6100965674. The cubic root of 64233975 is about 400.4868551065.

The spelling of 64233975 in words is "sixty-four million, two hundred thirty-three thousand, nine hundred seventy-five".