634311013 has 8 divisors (see below), whose sum is σ = 740351232. Its totient is φ = 532126896.

The previous prime is 634310969. The next prime is 634311031. The reversal of 634311013 is 310113436.

It is a happy number.

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

It is not a de Polignac number, because 634311013 - 2¹⁷ = 634179941 is a prime.

It is a super-2 number, since 2×634311013² = 804700922426172338, 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 (634312013) 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, 963670 + ... + 964327.

It is an arithmetic number, because the mean of its divisors is an integer number (92543904).

Almost surely, 2^634311013 is an apocalyptic number.

It is an amenable number.

634311013 is a deficient number, since it is larger than the sum of its proper divisors (106040219).

634311013 is a wasteful number, since it uses less digits than its factorization.

634311013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928051.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 634311013 is about 25185.5318188836. The cubic root of 634311013 is about 859.2128244108.

Adding to 634311013 its reverse (310113436), we get a palindrome (944424449).

The spelling of 634311013 in words is "six hundred thirty-four million, three hundred eleven thousand, thirteen".