634381323 has 4 divisors (see below), whose sum is σ = 845841768. Its totient is φ = 422920880.

The previous prime is 634381313. The next prime is 634381339. The reversal of 634381323 is 323183436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634381323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634381313) 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, 105730218 + ... + 105730223.

It is an arithmetic number, because the mean of its divisors is an integer number (211460442).

Almost surely, 2^634381323 is an apocalyptic number.

634381323 is a deficient number, since it is larger than the sum of its proper divisors (211460445).

634381323 is a wasteful number, since it uses less digits than its factorization.

634381323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211460444.

The product of its digits is 31104, while the sum is 33.

The square root of 634381323 is about 25186.9276212880. The cubic root of 634381323 is about 859.2445696275.

The spelling of 634381323 in words is "six hundred thirty-four million, three hundred eighty-one thousand, three hundred twenty-three".