117911427 has 4 divisors (see below), whose sum is σ = 157215240. Its totient is φ = 78607616.

The previous prime is 117911407. The next prime is 117911447. The reversal of 117911427 is 724119711.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (117911407) and next prime (117911447).

It is a cyclic number.

It is not a de Polignac number, because 117911427 - 2¹⁸ = 117649283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117911407) 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, 19651902 + ... + 19651907.

It is an arithmetic number, because the mean of its divisors is an integer number (39303810).

Almost surely, 2^117911427 is an apocalyptic number.

117911427 is a deficient number, since it is larger than the sum of its proper divisors (39303813).

117911427 is an equidigital number, since it uses as much as digits as its factorization.

117911427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39303812.

The product of its digits is 3528, while the sum is 33.

The square root of 117911427 is about 10858.7028230816. The cubic root of 117911427 is about 490.3640595847.

The spelling of 117911427 in words is "one hundred seventeen million, nine hundred eleven thousand, four hundred twenty-seven".