117530381 has 4 divisors (see below), whose sum is σ = 117553500. Its totient is φ = 117507264.

The previous prime is 117530377. The next prime is 117530383. The reversal of 117530381 is 183035711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72760900 + 44769481 = 8530^2 + 6691^2 .

It is a cyclic number.

It is not a de Polignac number, because 117530381 - 2² = 117530377 is a prime.

It is a super-3 number, since 3×117530381³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117530383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236 + ... + 15333.

It is an arithmetic number, because the mean of its divisors is an integer number (29388375).

Almost surely, 2^117530381 is an apocalyptic number.

It is an amenable number.

117530381 is a deficient number, since it is larger than the sum of its proper divisors (23119).

117530381 is an equidigital number, since it uses as much as digits as its factorization.

117530381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23118.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 117530381 is about 10841.1429747974. The cubic root of 117530381 is about 489.8352646286.

The spelling of 117530381 in words is "one hundred seventeen million, five hundred thirty thousand, three hundred eighty-one".