634401231 has 8 divisors (see below), whose sum is σ = 865539840. Its totient is φ = 413098392.

The previous prime is 634401227. The next prime is 634401247. The reversal of 634401231 is 132104436.

634401231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 634401231 - 2² = 634401227 is a prime.

It is a super-2 number, since 2×634401231² = 804929843788630722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634401731) 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, 2458791 + ... + 2459048.

It is an arithmetic number, because the mean of its divisors is an integer number (108192480).

Almost surely, 2^634401231 is an apocalyptic number.

634401231 is a deficient number, since it is larger than the sum of its proper divisors (231138609).

634401231 is a wasteful number, since it uses less digits than its factorization.

634401231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4917885.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 634401231 is about 25187.3228231982. The cubic root of 634401231 is about 859.2535577347.

Adding to 634401231 its reverse (132104436), we get a palindrome (766505667).

The spelling of 634401231 in words is "six hundred thirty-four million, four hundred one thousand, two hundred thirty-one".