117139409 has 2 divisors, whose sum is σ = 117139410. Its totient is φ = 117139408.

The previous prime is 117139403. The next prime is 117139423. The reversal of 117139409 is 904931711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90307009 + 26832400 = 9503^2 + 5180^2 .

It is a cyclic number.

It is not a de Polignac number, because 117139409 - 2⁸ = 117139153 is a prime.

It is a super-2 number, since 2×117139409² = 27443282281738562, which contains 22 as substring.

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, 58569704 + 58569705.

It is an arithmetic number, because the mean of its divisors is an integer number (58569705).

Almost surely, 2^117139409 is an apocalyptic number.

It is an amenable number.

117139409 is a deficient number, since it is larger than the sum of its proper divisors (1).

117139409 is an equidigital number, since it uses as much as digits as its factorization.

117139409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 117139409 is about 10823.0960912301. The cubic root of 117139409 is about 489.2915055783.

The spelling of 117139409 in words is "one hundred seventeen million, one hundred thirty-nine thousand, four hundred nine".