117648637 has 4 divisors (see below), whose sum is σ = 117675520. Its totient is φ = 117621756.

The previous prime is 117648623. The next prime is 117648649. The reversal of 117648637 is 736846711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 736846711 = 41 ⋅17971871.

It is a cyclic number.

It is not a de Polignac number, because 117648637 - 2²³ = 109260029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117648593 and 117648602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117648667) 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, 5187 + ... + 16192.

It is an arithmetic number, because the mean of its divisors is an integer number (29418880).

Almost surely, 2^117648637 is an apocalyptic number.

It is an amenable number.

117648637 is a deficient number, since it is larger than the sum of its proper divisors (26883).

117648637 is an equidigital number, since it uses as much as digits as its factorization.

117648637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26882.

The product of its digits is 169344, while the sum is 43.

The square root of 117648637 is about 10846.5956410295. The cubic root of 117648637 is about 489.9994960428. Note that the first 3 decimals are identical.

The spelling of 117648637 in words is "one hundred seventeen million, six hundred forty-eight thousand, six hundred thirty-seven".