158947987 has 4 divisors (see below), whose sum is σ = 173397816. Its totient is φ = 144498160.

The previous prime is 158947981. The next prime is 158948087. The reversal of 158947987 is 789749851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158947987 - 2¹⁵ = 158915219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158947981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7224898 + ... + 7224919.

It is an arithmetic number, because the mean of its divisors is an integer number (43349454).

Almost surely, 2^158947987 is an apocalyptic number.

158947987 is a deficient number, since it is larger than the sum of its proper divisors (14449829).

158947987 is a wasteful number, since it uses less digits than its factorization.

158947987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14449828.

The product of its digits is 5080320, while the sum is 58.

The square root of 158947987 is about 12607.4575946144. The cubic root of 158947987 is about 541.6910715737.

The spelling of 158947987 in words is "one hundred fifty-eight million, nine hundred forty-seven thousand, nine hundred eighty-seven".