634320031 has 6 divisors (see below), whose sum is σ = 673828160. Its totient is φ = 597006816.

The previous prime is 634320017. The next prime is 634320079. The reversal of 634320031 is 130023436.

It is a de Polignac number, because none of the positive numbers 2^k-634320031 is a prime.

It is a super-2 number, since 2×634320031² = 804723803455681922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634319984 and 634320011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634320091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1097151 + ... + 1097728.

Almost surely, 2^634320031 is an apocalyptic number.

634320031 is a deficient number, since it is larger than the sum of its proper divisors (39508129).

634320031 is a wasteful number, since it uses less digits than its factorization.

634320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194913 (or 2194896 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 634320031 is about 25185.7108496068. The cubic root of 634320031 is about 859.2168962012.

Adding to 634320031 its reverse (130023436), we get a palindrome (764343467).

The spelling of 634320031 in words is "six hundred thirty-four million, three hundred twenty thousand, thirty-one".