64633723 has 24 divisors (see below), whose sum is σ = 81932256. Its totient is φ = 49906560.

The previous prime is 64633693. The next prime is 64633739. The reversal of 64633723 is 32733646.

It is not a de Polignac number, because 64633723 - 2⁹ = 64633211 is a prime.

It is a super-3 number, since 3×64633723³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64633123) 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, 115761 + ... + 116317.

It is an arithmetic number, because the mean of its divisors is an integer number (3413844).

Almost surely, 2^64633723 is an apocalyptic number.

64633723 is a deficient number, since it is larger than the sum of its proper divisors (17298533).

64633723 is a wasteful number, since it uses less digits than its factorization.

64633723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 712 counting only the distinct ones).

The product of its digits is 54432, while the sum is 34.

The square root of 64633723 is about 8039.5101218918. The cubic root of 64633723 is about 401.3159223734.

It can be divided in two parts, 64633 and 723, that added together give a palindrome (65356).

The spelling of 64633723 in words is "sixty-four million, six hundred thirty-three thousand, seven hundred twenty-three".