159994729 has 2 divisors, whose sum is σ = 159994730. Its totient is φ = 159994728.

The previous prime is 159994717. The next prime is 159994753. The reversal of 159994729 is 927499951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95160025 + 64834704 = 9755^2 + 8052^2 .

It is a cyclic number.

It is not a de Polignac number, because 159994729 - 2²¹ = 157897577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159994729.

It is not a weakly prime, because it can be changed into another prime (159994229) 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, 79997364 + 79997365.

It is an arithmetic number, because the mean of its divisors is an integer number (79997365).

Almost surely, 2^159994729 is an apocalyptic number.

It is an amenable number.

159994729 is a deficient number, since it is larger than the sum of its proper divisors (1).

159994729 is an equidigital number, since it uses as much as digits as its factorization.

159994729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 55.

The square root of 159994729 is about 12648.9022843882. The cubic root of 159994729 is about 542.8775617138.

The spelling of 159994729 in words is "one hundred fifty-nine million, nine hundred ninety-four thousand, seven hundred twenty-nine".