159878409 has 8 divisors (see below), whose sum is σ = 213230400. Its totient is φ = 106556016.

The previous prime is 159878401. The next prime is 159878417. The reversal of 159878409 is 904878951.

It is an interprime number because it is at equal distance from previous prime (159878401) and next prime (159878417).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159878409 - 2³ = 159878401 is a prime.

It is a super-2 number, since 2×159878409² = 51122211328742562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (159878401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14299 + ... + 22895.

It is an arithmetic number, because the mean of its divisors is an integer number (26653800).

Almost surely, 2^159878409 is an apocalyptic number.

It is an amenable number.

159878409 is a deficient number, since it is larger than the sum of its proper divisors (53351991).

159878409 is an equidigital number, since it uses as much as digits as its factorization.

159878409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14799.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 159878409 is about 12644.3034209086. The cubic root of 159878409 is about 542.7459681549.

The spelling of 159878409 in words is "one hundred fifty-nine million, eight hundred seventy-eight thousand, four hundred nine".