159599261 has 2 divisors, whose sum is σ = 159599262. Its totient is φ = 159599260.

The previous prime is 159599233. The next prime is 159599269. The reversal of 159599261 is 162995951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148376761 + 11222500 = 12181^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 159599261 - 2²⁶ = 92490397 is a prime.

It is a super-2 number, since 2×159599261² = 50943848223492242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159599269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79799630 + 79799631.

It is an arithmetic number, because the mean of its divisors is an integer number (79799631).

Almost surely, 2^159599261 is an apocalyptic number.

It is an amenable number.

159599261 is a deficient number, since it is larger than the sum of its proper divisors (1).

159599261 is an equidigital number, since it uses as much as digits as its factorization.

159599261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 218700, while the sum is 47.

The square root of 159599261 is about 12633.2601097262. The cubic root of 159599261 is about 542.4299056443.

The spelling of 159599261 in words is "one hundred fifty-nine million, five hundred ninety-nine thousand, two hundred sixty-one".