159908491 has 2 divisors, whose sum is σ = 159908492. Its totient is φ = 159908490.

The previous prime is 159908461. The next prime is 159908501. The reversal of 159908491 is 194809951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159908491 - 2⁷ = 159908363 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (159908461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79954245 + 79954246.

It is an arithmetic number, because the mean of its divisors is an integer number (79954246).

Almost surely, 2^159908491 is an apocalyptic number.

159908491 is a deficient number, since it is larger than the sum of its proper divisors (1).

159908491 is an equidigital number, since it uses as much as digits as its factorization.

159908491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 159908491 is about 12645.4929124965. The cubic root of 159908491 is about 542.7800062309.

The spelling of 159908491 in words is "one hundred fifty-nine million, nine hundred eight thousand, four hundred ninety-one".