634445131 has 4 divisors (see below), whose sum is σ = 667837000. Its totient is φ = 601053264.

The previous prime is 634445099. The next prime is 634445143. The reversal of 634445131 is 131544436.

It is a happy number.

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 634445131 - 2⁵ = 634445099 is a prime.

It is a super-2 number, since 2×634445131² = 805041248499214322, 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 = 634445093 and 634445102.

It is not an unprimeable number, because it can be changed into a prime (634445171) 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, 16695906 + ... + 16695943.

It is an arithmetic number, because the mean of its divisors is an integer number (166959250).

Almost surely, 2^634445131 is an apocalyptic number.

634445131 is a deficient number, since it is larger than the sum of its proper divisors (33391869).

634445131 is a wasteful number, since it uses less digits than its factorization.

634445131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33391868.

The product of its digits is 17280, while the sum is 31.

The square root of 634445131 is about 25188.1942782725. The cubic root of 634445131 is about 859.2733771377.

Adding to 634445131 its reverse (131544436), we get a palindrome (765989567).

The spelling of 634445131 in words is "six hundred thirty-four million, four hundred forty-five thousand, one hundred thirty-one".