637113427 has 4 divisors (see below), whose sum is σ = 637235800. Its totient is φ = 636991056.

The previous prime is 637113419. The next prime is 637113439. The reversal of 637113427 is 724311736.

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 637113427 - 2³ = 637113419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 637113392 and 637113401.

It is not an unprimeable number, because it can be changed into a prime (637113487) 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, 53013 + ... + 63910.

It is an arithmetic number, because the mean of its divisors is an integer number (159308950).

Almost surely, 2^637113427 is an apocalyptic number.

637113427 is a deficient number, since it is larger than the sum of its proper divisors (122373).

637113427 is a wasteful number, since it uses less digits than its factorization.

637113427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122372.

The product of its digits is 21168, while the sum is 34.

The square root of 637113427 is about 25241.1058989102. The cubic root of 637113427 is about 860.4763122223.

The spelling of 637113427 in words is "six hundred thirty-seven million, one hundred thirteen thousand, four hundred twenty-seven".