159431761 has 2 divisors, whose sum is σ = 159431762. Its totient is φ = 159431760.

The previous prime is 159431759. The next prime is 159431801. The reversal of 159431761 is 167134951.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127577025 + 31854736 = 11295^2 + 5644^2 .

It is a cyclic number.

It is not a de Polignac number, because 159431761 - 2¹ = 159431759 is a prime.

It is a super-2 number, since 2×159431761² = 50836972831122242, which contains 22 as substring.

Together with 159431759, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 159431761.

It is not a weakly prime, because it can be changed into another prime (159431161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79715880 + 79715881.

It is an arithmetic number, because the mean of its divisors is an integer number (79715881).

Almost surely, 2^159431761 is an apocalyptic number.

It is an amenable number.

159431761 is a deficient number, since it is larger than the sum of its proper divisors (1).

159431761 is an equidigital number, since it uses as much as digits as its factorization.

159431761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 159431761 is about 12626.6290434146. The cubic root of 159431761 is about 542.2400785066.

The spelling of 159431761 in words is "one hundred fifty-nine million, four hundred thirty-one thousand, seven hundred sixty-one".