634238431 has 4 divisors (see below), whose sum is σ = 671546592. Its totient is φ = 596930272.

The previous prime is 634238417. The next prime is 634238447. The reversal of 634238431 is 134832436.

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

It is a cyclic number.

It is not a de Polignac number, because 634238431 - 2¹³ = 634230239 is a prime.

It is a super-2 number, since 2×634238431² = 804516774714683522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634238461) 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, 18654055 + ... + 18654088.

It is an arithmetic number, because the mean of its divisors is an integer number (167886648).

Almost surely, 2^634238431 is an apocalyptic number.

634238431 is a deficient number, since it is larger than the sum of its proper divisors (37308161).

634238431 is a wasteful number, since it uses less digits than its factorization.

634238431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37308160.

The product of its digits is 41472, while the sum is 34.

The square root of 634238431 is about 25184.0908313165. The cubic root of 634238431 is about 859.1800509170.

The spelling of 634238431 in words is "six hundred thirty-four million, two hundred thirty-eight thousand, four hundred thirty-one".