155089879 has 4 divisors (see below), whose sum is σ = 177245584. Its totient is φ = 132934176.

The previous prime is 155089867. The next prime is 155089889. The reversal of 155089879 is 978980551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978980551 = 97 ⋅10092583.

It is a cyclic number.

It is not a de Polignac number, because 155089879 - 2⁹ = 155089367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155089849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11077842 + ... + 11077855.

It is an arithmetic number, because the mean of its divisors is an integer number (44311396).

Almost surely, 2^155089879 is an apocalyptic number.

155089879 is a deficient number, since it is larger than the sum of its proper divisors (22155705).

155089879 is an equidigital number, since it uses as much as digits as its factorization.

155089879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22155704.

The product of its (nonzero) digits is 907200, while the sum is 52.

The square root of 155089879 is about 12453.5087023698. The cubic root of 155089879 is about 537.2723437565.

The spelling of 155089879 in words is "one hundred fifty-five million, eighty-nine thousand, eight hundred seventy-nine".