159998903 has 2 divisors, whose sum is σ = 159998904. Its totient is φ = 159998902.

The previous prime is 159998873. The next prime is 159998911. The reversal of 159998903 is 309899951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159998903 - 2⁸ = 159998647 is a prime.

It is a super-2 number, since 2×159998903² = 51199297922406818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159998953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79999451 + 79999452.

It is an arithmetic number, because the mean of its divisors is an integer number (79999452).

Almost surely, 2^159998903 is an apocalyptic number.

159998903 is a deficient number, since it is larger than the sum of its proper divisors (1).

159998903 is an equidigital number, since it uses as much as digits as its factorization.

159998903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 53.

The square root of 159998903 is about 12649.0672778668. The cubic root of 159998903 is about 542.8822826011.

The spelling of 159998903 in words is "one hundred fifty-nine million, nine hundred ninety-eight thousand, nine hundred three".