159627991 has 2 divisors, whose sum is σ = 159627992. Its totient is φ = 159627990.

The previous prime is 159627973. The next prime is 159628003. The reversal of 159627991 is 199726951.

It is a strong prime.

It is an emirp because it is prime and its reverse (199726951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159627991 - 2¹¹ = 159625943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159627901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79813995 + 79813996.

It is an arithmetic number, because the mean of its divisors is an integer number (79813996).

Almost surely, 2^159627991 is an apocalyptic number.

159627991 is a deficient number, since it is larger than the sum of its proper divisors (1).

159627991 is an equidigital number, since it uses as much as digits as its factorization.

159627991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 49.

The square root of 159627991 is about 12634.3971363892. The cubic root of 159627991 is about 542.4624519023.

The spelling of 159627991 in words is "one hundred fifty-nine million, six hundred twenty-seven thousand, nine hundred ninety-one".