118942409 has 2 divisors, whose sum is σ = 118942410. Its totient is φ = 118942408.

The previous prime is 118942393. The next prime is 118942423. The reversal of 118942409 is 904249811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 5626384 = 10645^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 118942409 - 2⁴ = 118942393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118942459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59471204 + 59471205.

It is an arithmetic number, because the mean of its divisors is an integer number (59471205).

Almost surely, 2^118942409 is an apocalyptic number.

It is an amenable number.

118942409 is a deficient number, since it is larger than the sum of its proper divisors (1).

118942409 is an equidigital number, since it uses as much as digits as its factorization.

118942409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 118942409 is about 10906.0721160278. The cubic root of 118942409 is about 491.7891127506.

The spelling of 118942409 in words is "one hundred eighteen million, nine hundred forty-two thousand, four hundred nine".