159391849 has 2 divisors, whose sum is σ = 159391850. Its totient is φ = 159391848.

The previous prime is 159391783. The next prime is 159391853. The reversal of 159391849 is 948193951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159264400 + 127449 = 12620^2 + 357^2 .

It is an emirp because it is prime and its reverse (948193951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159391849 - 2¹³ = 159383657 is a prime.

It is not a weakly prime, because it can be changed into another prime (159391879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79695924 + 79695925.

It is an arithmetic number, because the mean of its divisors is an integer number (79695925).

Almost surely, 2^159391849 is an apocalyptic number.

It is an amenable number.

159391849 is a deficient number, since it is larger than the sum of its proper divisors (1).

159391849 is an equidigital number, since it uses as much as digits as its factorization.

159391849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 49.

The square root of 159391849 is about 12625.0484751545. The cubic root of 159391849 is about 542.1948267700.

The spelling of 159391849 in words is "one hundred fifty-nine million, three hundred ninety-one thousand, eight hundred forty-nine".