117812087 has 4 divisors (see below), whose sum is σ = 118191216. Its totient is φ = 117432960.

The previous prime is 117812053. The next prime is 117812089. The reversal of 117812087 is 780218711.

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 117812087 - 2¹⁰ = 117811063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117812089) 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, 189098 + ... + 189719.

It is an arithmetic number, because the mean of its divisors is an integer number (29547804).

Almost surely, 2^117812087 is an apocalyptic number.

117812087 is a deficient number, since it is larger than the sum of its proper divisors (379129).

117812087 is an equidigital number, since it uses as much as digits as its factorization.

117812087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379128.

The product of its (nonzero) digits is 6272, while the sum is 35.

The square root of 117812087 is about 10854.1276480425. The cubic root of 117812087 is about 490.2263108427.

The spelling of 117812087 in words is "one hundred seventeen million, eight hundred twelve thousand, eighty-seven".