158971887 has 6 divisors (see below), whose sum is σ = 229626072. Its totient is φ = 105981252.

The previous prime is 158971877. The next prime is 158971961. The reversal of 158971887 is 788179851.

It is not a de Polignac number, because 158971887 - 2⁴ = 158971871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158971807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8831763 + ... + 8831780.

It is an arithmetic number, because the mean of its divisors is an integer number (38271012).

Almost surely, 2^158971887 is an apocalyptic number.

158971887 is a deficient number, since it is larger than the sum of its proper divisors (70654185).

158971887 is a wasteful number, since it uses less digits than its factorization.

158971887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17663549 (or 17663546 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 54.

The square root of 158971887 is about 12608.4054106774. The cubic root of 158971887 is about 541.7182204291.

The spelling of 158971887 in words is "one hundred fifty-eight million, nine hundred seventy-one thousand, eight hundred eighty-seven".