117381523 has 4 divisors (see below), whose sum is σ = 134150320. Its totient is φ = 100612728.

The previous prime is 117381499. The next prime is 117381527. The reversal of 117381523 is 325183711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325183711 = 199 ⋅1634089.

It is a cyclic number.

It is not a de Polignac number, because 117381523 - 2²¹ = 115284371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117381527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8384388 + ... + 8384401.

It is an arithmetic number, because the mean of its divisors is an integer number (33537580).

Almost surely, 2^117381523 is an apocalyptic number.

117381523 is a deficient number, since it is larger than the sum of its proper divisors (16768797).

117381523 is an equidigital number, since it uses as much as digits as its factorization.

117381523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16768796.

The product of its digits is 5040, while the sum is 31.

The square root of 117381523 is about 10834.2753795535. The cubic root of 117381523 is about 489.6283771194.

The spelling of 117381523 in words is "one hundred seventeen million, three hundred eighty-one thousand, five hundred twenty-three".