117920439 has 24 divisors (see below), whose sum is σ = 209637792. Its totient is φ = 62199360.

The previous prime is 117920431. The next prime is 117920447. The reversal of 117920439 is 934029711.

It is an interprime number because it is at equal distance from previous prime (117920431) and next prime (117920447).

It is not a de Polignac number, because 117920439 - 2³ = 117920431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117920431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71172 + ... + 72809.

It is an arithmetic number, because the mean of its divisors is an integer number (8734908).

Almost surely, 2^117920439 is an apocalyptic number.

117920439 is a deficient number, since it is larger than the sum of its proper divisors (91717353).

117920439 is a wasteful number, since it uses less digits than its factorization.

117920439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144007 (or 144004 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 117920439 is about 10859.1177818458. The cubic root of 117920439 is about 490.3765521492.

The spelling of 117920439 in words is "one hundred seventeen million, nine hundred twenty thousand, four hundred thirty-nine".