158979919 has 16 divisors (see below), whose sum is σ = 186762240. Its totient is φ = 132488640.

The previous prime is 158979917. The next prime is 158979967. The reversal of 158979919 is 919979851.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 158979919 - 2¹ = 158979917 is a prime.

It is a super-2 number, since 2×158979919² = 50549229290493122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158979917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102262 + ... + 103804.

It is an arithmetic number, because the mean of its divisors is an integer number (11672640).

Almost surely, 2^158979919 is an apocalyptic number.

158979919 is a deficient number, since it is larger than the sum of its proper divisors (27782321).

158979919 is a wasteful number, since it uses less digits than its factorization.

158979919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950.

The product of its digits is 1837080, while the sum is 58.

The square root of 158979919 is about 12608.7239243311. The cubic root of 158979919 is about 541.7273436512.

The spelling of 158979919 in words is "one hundred fifty-eight million, nine hundred seventy-nine thousand, nine hundred nineteen".