158439169 has 4 divisors (see below), whose sum is σ = 181073344. Its totient is φ = 135804996.

The previous prime is 158439137. The next prime is 158439173. The reversal of 158439169 is 961934851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 961934851 = 17 ⋅56584403.

It is a cyclic number.

It is not a de Polignac number, because 158439169 - 2⁵ = 158439137 is a prime.

It is a super-2 number, since 2×158439169² = 50205940546821122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158439179) 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, 11317077 + ... + 11317090.

It is an arithmetic number, because the mean of its divisors is an integer number (45268336).

Almost surely, 2^158439169 is an apocalyptic number.

It is an amenable number.

158439169 is a deficient number, since it is larger than the sum of its proper divisors (22634175).

158439169 is an equidigital number, since it uses as much as digits as its factorization.

158439169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22634174.

The product of its digits is 233280, while the sum is 46.

The square root of 158439169 is about 12587.2621725298. The cubic root of 158439169 is about 541.1124403694.

The spelling of 158439169 in words is "one hundred fifty-eight million, four hundred thirty-nine thousand, one hundred sixty-nine".