158338865 has 4 divisors (see below), whose sum is σ = 190006644. Its totient is φ = 126671088.

The previous prime is 158338861. The next prime is 158338883. The reversal of 158338865 is 568833851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568833851 = 233 ⋅2441347.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 136585969 = 4664^2 + 11687^2 .

It is a cyclic number.

It is not a de Polignac number, because 158338865 - 2² = 158338861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158338861) 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, 15833882 + ... + 15833891.

It is an arithmetic number, because the mean of its divisors is an integer number (47501661).

Almost surely, 2^158338865 is an apocalyptic number.

It is an amenable number.

158338865 is a deficient number, since it is larger than the sum of its proper divisors (31667779).

158338865 is an equidigital number, since it uses as much as digits as its factorization.

158338865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31667778.

The product of its digits is 691200, while the sum is 47.

The square root of 158338865 is about 12583.2771963428. The cubic root of 158338865 is about 540.9982278714.

The spelling of 158338865 in words is "one hundred fifty-eight million, three hundred thirty-eight thousand, eight hundred sixty-five".