159196909 has 2 divisors, whose sum is σ = 159196910. Its totient is φ = 159196908.

The previous prime is 159196861. The next prime is 159196931. The reversal of 159196909 is 909691951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138721284 + 20475625 = 11778^2 + 4525^2 .

It is a cyclic number.

It is not a de Polignac number, because 159196909 - 2¹⁹ = 158672621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159196969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79598454 + 79598455.

It is an arithmetic number, because the mean of its divisors is an integer number (79598455).

Almost surely, 2^159196909 is an apocalyptic number.

It is an amenable number.

159196909 is a deficient number, since it is larger than the sum of its proper divisors (1).

159196909 is an equidigital number, since it uses as much as digits as its factorization.

159196909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196830, while the sum is 49.

The square root of 159196909 is about 12617.3257467658. The cubic root of 159196909 is about 541.9736975658.

The spelling of 159196909 in words is "one hundred fifty-nine million, one hundred ninety-six thousand, nine hundred nine".