117643637 has 8 divisors (see below), whose sum is σ = 121759512. Its totient is φ = 113587200.

The previous prime is 117643607. The next prime is 117643639. The reversal of 117643637 is 736346711.

It can be written as a sum of positive squares in 4 ways, for example, as 5262436 + 112381201 = 2294^2 + 10601^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 117643637 - 2⁸ = 117643381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117643637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117643639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10814 + ... + 18767.

It is an arithmetic number, because the mean of its divisors is an integer number (15219939).

Almost surely, 2^117643637 is an apocalyptic number.

It is an amenable number.

117643637 is a deficient number, since it is larger than the sum of its proper divisors (4115875).

117643637 is an equidigital number, since it uses as much as digits as its factorization.

117643637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29719.

The product of its digits is 63504, while the sum is 38.

The square root of 117643637 is about 10846.3651515150. The cubic root of 117643637 is about 489.9925543780.

The spelling of 117643637 in words is "one hundred seventeen million, six hundred forty-three thousand, six hundred thirty-seven".