158730865 has 4 divisors (see below), whose sum is σ = 190477044. Its totient is φ = 126984688.

The previous prime is 158730857. The next prime is 158730917. The reversal of 158730865 is 568037851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568037851 = 19 ⋅29896729.

It can be written as a sum of positive squares in 2 ways, for example, as 39287824 + 119443041 = 6268^2 + 10929^2 .

It is a cyclic number.

It is not a de Polignac number, because 158730865 - 2³ = 158730857 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 15873082 + ... + 15873091.

It is an arithmetic number, because the mean of its divisors is an integer number (47619261).

Almost surely, 2^158730865 is an apocalyptic number.

It is an amenable number.

158730865 is a deficient number, since it is larger than the sum of its proper divisors (31746179).

158730865 is an equidigital number, since it uses as much as digits as its factorization.

158730865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31746178.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 158730865 is about 12598.8437961584. The cubic root of 158730865 is about 541.4443102596. Note that the first 3 decimals are identical.

The spelling of 158730865 in words is "one hundred fifty-eight million, seven hundred thirty thousand, eight hundred sixty-five".