117331787 has 4 divisors (see below), whose sum is σ = 119828256. Its totient is φ = 114835320.

The previous prime is 117331777. The next prime is 117331817. The reversal of 117331787 is 787133711.

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 117331787 - 2⁶ = 117331723 is a prime.

It is a super-2 number, since 2×117331787² = 27533496481226738, which contains 22 as substring.

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 117331787.

It is not an unprimeable number, because it can be changed into a prime (117331757) 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, 1248164 + ... + 1248257.

It is an arithmetic number, because the mean of its divisors is an integer number (29957064).

Almost surely, 2^117331787 is an apocalyptic number.

117331787 is a deficient number, since it is larger than the sum of its proper divisors (2496469).

117331787 is an equidigital number, since it uses as much as digits as its factorization.

117331787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496468.

The product of its digits is 24696, while the sum is 38.

The square root of 117331787 is about 10831.9798282678. The cubic root of 117331787 is about 489.5592134879.

The spelling of 117331787 in words is "one hundred seventeen million, three hundred thirty-one thousand, seven hundred eighty-seven".