117556689 has 4 divisors (see below), whose sum is σ = 156742256. Its totient is φ = 78371124.

The previous prime is 117556687. The next prime is 117556697. The reversal of 117556689 is 986655711.

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.

It is not a de Polignac number, because 117556689 - 2¹ = 117556687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117556687) 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, 19592779 + ... + 19592784.

It is an arithmetic number, because the mean of its divisors is an integer number (39185564).

Almost surely, 2^117556689 is an apocalyptic number.

It is an amenable number.

117556689 is a deficient number, since it is larger than the sum of its proper divisors (39185567).

117556689 is an equidigital number, since it uses as much as digits as its factorization.

117556689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39185566.

The product of its digits is 453600, while the sum is 48.

The square root of 117556689 is about 10842.3562476060. The cubic root of 117556689 is about 489.8718101432.

The spelling of 117556689 in words is "one hundred seventeen million, five hundred fifty-six thousand, six hundred eighty-nine".