117139423 has 2 divisors, whose sum is σ = 117139424. Its totient is φ = 117139422.

The previous prime is 117139409. The next prime is 117139433. The reversal of 117139423 is 324931711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117139423 - 2⁹ = 117138911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117139403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58569711 + 58569712.

It is an arithmetic number, because the mean of its divisors is an integer number (58569712).

Almost surely, 2^117139423 is an apocalyptic number.

117139423 is a deficient number, since it is larger than the sum of its proper divisors (1).

117139423 is an equidigital number, since it uses as much as digits as its factorization.

117139423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 117139423 is about 10823.0967379951. The cubic root of 117139423 is about 489.2915250710.

The spelling of 117139423 in words is "one hundred seventeen million, one hundred thirty-nine thousand, four hundred twenty-three".