161098159 has 2 divisors, whose sum is σ = 161098160. Its totient is φ = 161098158.

The previous prime is 161098123. The next prime is 161098177. The reversal of 161098159 is 951890161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161098159 - 2¹⁹ = 160573871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161098109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80549079 + 80549080.

It is an arithmetic number, because the mean of its divisors is an integer number (80549080).

Almost surely, 2^161098159 is an apocalyptic number.

161098159 is a deficient number, since it is larger than the sum of its proper divisors (1).

161098159 is an equidigital number, since it uses as much as digits as its factorization.

161098159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 161098159 is about 12692.4449575328. Note that the first 3 decimals coincide. The cubic root of 161098159 is about 544.1227184487.

The spelling of 161098159 in words is "one hundred sixty-one million, ninety-eight thousand, one hundred fifty-nine".