117139421 has 16 divisors (see below), whose sum is σ = 140156928. Its totient is φ = 95785200.

The previous prime is 117139409. The next prime is 117139423. The reversal of 117139421 is 124931711.

It is not a de Polignac number, because 117139421 - 2¹⁴ = 117123037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117139423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11606 + ... + 19208.

It is an arithmetic number, because the mean of its divisors is an integer number (8759808).

Almost surely, 2^117139421 is an apocalyptic number.

It is an amenable number.

117139421 is a deficient number, since it is larger than the sum of its proper divisors (23017507).

117139421 is an equidigital number, since it uses as much as digits as its factorization.

117139421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712.

The product of its digits is 1512, while the sum is 29.

The square root of 117139421 is about 10823.0966456001. The cubic root of 117139421 is about 489.2915222863.

The spelling of 117139421 in words is "one hundred seventeen million, one hundred thirty-nine thousand, four hundred twenty-one".