117256719 has 4 divisors (see below), whose sum is σ = 156342296. Its totient is φ = 78171144.

The previous prime is 117256717. The next prime is 117256739. The reversal of 117256719 is 917652711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917652711 = 3 ⋅305884237.

It is not a de Polignac number, because 117256719 - 2¹ = 117256717 is a prime.

It is a super-2 number, since 2×117256719² = 27498276301289922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117256717) 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, 19542784 + ... + 19542789.

It is an arithmetic number, because the mean of its divisors is an integer number (39085574).

Almost surely, 2^117256719 is an apocalyptic number.

117256719 is a deficient number, since it is larger than the sum of its proper divisors (39085577).

117256719 is an equidigital number, since it uses as much as digits as its factorization.

117256719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39085576.

The product of its digits is 26460, while the sum is 39.

The square root of 117256719 is about 10828.5141640024. The cubic root of 117256719 is about 489.4547857726.

The spelling of 117256719 in words is "one hundred seventeen million, two hundred fifty-six thousand, seven hundred nineteen".