117439257 has 8 divisors (see below), whose sum is σ = 168630784. Its totient is φ = 72270288.

The previous prime is 117439237. The next prime is 117439279. The reversal of 117439257 is 752934711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117439257 - 2¹¹ = 117437209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3011263 = 117439257 / (1 + 1 + 7 + 4 + 3 + 9 + 2 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117439207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505593 + ... + 1505670.

It is an arithmetic number, because the mean of its divisors is an integer number (21078848).

Almost surely, 2^117439257 is an apocalyptic number.

It is an amenable number.

117439257 is a deficient number, since it is larger than the sum of its proper divisors (51191527).

117439257 is a wasteful number, since it uses less digits than its factorization.

117439257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011279.

The product of its digits is 52920, while the sum is 39.

The square root of 117439257 is about 10836.9394664730. The cubic root of 117439257 is about 489.7086383925.

The spelling of 117439257 in words is "one hundred seventeen million, four hundred thirty-nine thousand, two hundred fifty-seven".