158997005 has 16 divisors (see below), whose sum is σ = 206323200. Its totient is φ = 117165312.

The previous prime is 158996983. The next prime is 158997017. The reversal of 158997005 is 500799851.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 158997005 - 2⁶ = 158996941 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15905 + ... + 23894.

It is an arithmetic number, because the mean of its divisors is an integer number (12895200).

Almost surely, 2^158997005 is an apocalyptic number.

It is an amenable number.

158997005 is a deficient number, since it is larger than the sum of its proper divisors (47326195).

158997005 is a wasteful number, since it uses less digits than its factorization.

158997005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39868.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 158997005 is about 12609.4014528843. The cubic root of 158997005 is about 541.7467499214.

The spelling of 158997005 in words is "one hundred fifty-eight million, nine hundred ninety-seven thousand, five".