633638423 has 8 divisors (see below), whose sum is σ = 691425936. Its totient is φ = 575881600.

The previous prime is 633638413. The next prime is 633638459. The reversal of 633638423 is 324836336.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 633638423 - 2⁶ = 633638359 is a prime.

It is a super-2 number, since 2×633638423² = 802995302203853858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633638413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68015 + ... + 76767.

It is an arithmetic number, because the mean of its divisors is an integer number (86428242).

Almost surely, 2^633638423 is an apocalyptic number.

633638423 is a deficient number, since it is larger than the sum of its proper divisors (57787513).

633638423 is a wasteful number, since it uses less digits than its factorization.

633638423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15345.

The product of its digits is 186624, while the sum is 38.

The square root of 633638423 is about 25172.1755714519. The cubic root of 633638423 is about 858.9090289962.

The spelling of 633638423 in words is "six hundred thirty-three million, six hundred thirty-eight thousand, four hundred twenty-three".