9158987 has 4 divisors (see below), whose sum is σ = 9193056. Its totient is φ = 9124920.

The previous prime is 9158977. The next prime is 9158993. The reversal of 9158987 is 7898519.

It is a happy number.

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 9158987 - 2⁶ = 9158923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9158927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16628 + ... + 17169.

It is an arithmetic number, because the mean of its divisors is an integer number (2298264).

Almost surely, 2^9158987 is an apocalyptic number.

9158987 is a deficient number, since it is larger than the sum of its proper divisors (34069).

9158987 is a wasteful number, since it uses less digits than its factorization.

9158987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34068.

The product of its digits is 181440, while the sum is 47.

The square root of 9158987 is about 3026.3818331466. The cubic root of 9158987 is about 209.2260780177.

The spelling of 9158987 in words is "nine million, one hundred fifty-eight thousand, nine hundred eighty-seven".