159944987 has 2 divisors, whose sum is σ = 159944988. Its totient is φ = 159944986.

The previous prime is 159944957. The next prime is 159944999. The reversal of 159944987 is 789449951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159944987 - 2¹⁴ = 159928603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (159944957) 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, 79972493 + 79972494.

It is an arithmetic number, because the mean of its divisors is an integer number (79972494).

Almost surely, 2^159944987 is an apocalyptic number.

159944987 is a deficient number, since it is larger than the sum of its proper divisors (1).

159944987 is an equidigital number, since it uses as much as digits as its factorization.

159944987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 159944987 is about 12646.9358739578. The cubic root of 159944987 is about 542.8212960797.

The spelling of 159944987 in words is "one hundred fifty-nine million, nine hundred forty-four thousand, nine hundred eighty-seven".