89779155 has 32 divisors (see below), whose sum is σ = 146534400. Its totient is φ = 46929792.

The previous prime is 89779153. The next prime is 89779163. The reversal of 89779155 is 55197798.

It is not a de Polignac number, because 89779155 - 2¹ = 89779153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89779098 and 89779107.

It is not an unprimeable number, because it can be changed into a prime (89779153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283057 + ... + 283373.

It is an arithmetic number, because the mean of its divisors is an integer number (4579200).

Almost surely, 2^89779155 is an apocalyptic number.

89779155 is a deficient number, since it is larger than the sum of its proper divisors (56755245).

89779155 is a wasteful number, since it uses less digits than its factorization.

89779155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643.

The product of its digits is 793800, while the sum is 51.

The square root of 89779155 is about 9475.1862778523. The cubic root of 89779155 is about 447.7736204139.

The spelling of 89779155 in words is "eighty-nine million, seven hundred seventy-nine thousand, one hundred fifty-five".