158385987 has 6 divisors (see below), whose sum is σ = 228779772. Its totient is φ = 105590652.

The previous prime is 158385979. The next prime is 158385989. The reversal of 158385987 is 789583851.

158385987 is a `hidden beast` number, since 1 + 583 + 8 + 59 + 8 + 7 = 666.

It is not a de Polignac number, because 158385987 - 2³ = 158385979 is a prime.

It is a super-2 number, since 2×158385987² = 50172241755928338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158385989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8799213 + ... + 8799230.

It is an arithmetic number, because the mean of its divisors is an integer number (38129962).

Almost surely, 2^158385987 is an apocalyptic number.

158385987 is a deficient number, since it is larger than the sum of its proper divisors (70393785).

158385987 is a wasteful number, since it uses less digits than its factorization.

158385987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17598449 (or 17598446 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The square root of 158385987 is about 12585.1494627597. The cubic root of 158385987 is about 541.0518899756.

The spelling of 158385987 in words is "one hundred fifty-eight million, three hundred eighty-five thousand, nine hundred eighty-seven".