159955987 has 2 divisors, whose sum is σ = 159955988. Its totient is φ = 159955986.

The previous prime is 159955951. The next prime is 159956059. The reversal of 159955987 is 789559951.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159955987 is a prime.

It is not a weakly prime, because it can be changed into another prime (159955937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79977993 + 79977994.

It is an arithmetic number, because the mean of its divisors is an integer number (79977994).

Almost surely, 2^159955987 is an apocalyptic number.

159955987 is a deficient number, since it is larger than the sum of its proper divisors (1).

159955987 is an equidigital number, since it uses as much as digits as its factorization.

159955987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103000, while the sum is 58.

The square root of 159955987 is about 12647.3707544296. The cubic root of 159955987 is about 542.8337397278.

The spelling of 159955987 in words is "one hundred fifty-nine million, nine hundred fifty-five thousand, nine hundred eighty-seven".