117172839 has 16 divisors (see below), whose sum is σ = 184309760. Its totient is φ = 64795680.

The previous prime is 117172813. The next prime is 117172849. The reversal of 117172839 is 938271711.

It is not a de Polignac number, because 117172839 - 2¹³ = 117164647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117172797 and 117172806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117172849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89344 + ... + 90645.

It is an arithmetic number, because the mean of its divisors is an integer number (11519360).

Almost surely, 2^117172839 is an apocalyptic number.

117172839 is a deficient number, since it is larger than the sum of its proper divisors (67136921).

117172839 is a wasteful number, since it uses less digits than its factorization.

117172839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180030.

The product of its digits is 21168, while the sum is 39.

The square root of 117172839 is about 10824.6403635410. The cubic root of 117172839 is about 489.3380468730.

The spelling of 117172839 in words is "one hundred seventeen million, one hundred seventy-two thousand, eight hundred thirty-nine".