158663873 has 4 divisors (see below), whose sum is σ = 167997060. Its totient is φ = 149330688.

The previous prime is 158663863. The next prime is 158663893. The reversal of 158663873 is 378366851.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149035264 + 9628609 = 12208^2 + 3103^2 .

It is a cyclic number.

It is not a de Polignac number, because 158663873 - 2¹⁰ = 158662849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158663863) 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, 4666568 + ... + 4666601.

It is an arithmetic number, because the mean of its divisors is an integer number (41999265).

Almost surely, 2^158663873 is an apocalyptic number.

It is an amenable number.

158663873 is a deficient number, since it is larger than the sum of its proper divisors (9333187).

158663873 is an equidigital number, since it uses as much as digits as its factorization.

158663873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9333186.

The product of its digits is 725760, while the sum is 47.

The square root of 158663873 is about 12596.1848589166. The cubic root of 158663873 is about 541.3681277618.

The spelling of 158663873 in words is "one hundred fifty-eight million, six hundred sixty-three thousand, eight hundred seventy-three".