634344291 has 20 divisors (see below), whose sum is σ = 1082973232. Its totient is φ = 362482128.

The previous prime is 634344287. The next prime is 634344311. The reversal of 634344291 is 192443436.

It is a happy number.

It is not a de Polignac number, because 634344291 - 2² = 634344287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634344211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 558820 + ... + 559953.

Almost surely, 2^634344291 is an apocalyptic number.

634344291 is a deficient number, since it is larger than the sum of its proper divisors (448628941).

634344291 is a wasteful number, since it uses less digits than its factorization.

634344291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118792 (or 1118783 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 634344291 is about 25186.1924673024. The cubic root of 634344291 is about 859.2278498393.

The spelling of 634344291 in words is "six hundred thirty-four million, three hundred forty-four thousand, two hundred ninety-one".