159913987 has 2 divisors, whose sum is σ = 159913988. Its totient is φ = 159913986.

The previous prime is 159913973. The next prime is 159913991. The reversal of 159913987 is 789319951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159913987 - 2²³ = 151525379 is a prime.

It is not a weakly prime, because it can be changed into another prime (159913907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79956993 + 79956994.

It is an arithmetic number, because the mean of its divisors is an integer number (79956994).

Almost surely, 2^159913987 is an apocalyptic number.

159913987 is a deficient number, since it is larger than the sum of its proper divisors (1).

159913987 is an equidigital number, since it uses as much as digits as its factorization.

159913987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 52.

The square root of 159913987 is about 12645.7102212569. The cubic root of 159913987 is about 542.7862245472.

The spelling of 159913987 in words is "one hundred fifty-nine million, nine hundred thirteen thousand, nine hundred eighty-seven".