89789905 has 4 divisors (see below), whose sum is σ = 107747892. Its totient is φ = 71831920.

The previous prime is 89789879. The next prime is 89789929. The reversal of 89789905 is 50998798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49999041 + 39790864 = 7071^2 + 6308^2 .

It is not a de Polignac number, because 89789905 - 2⁵ = 89789873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8978986 + ... + 8978995.

It is an arithmetic number, because the mean of its divisors is an integer number (26936973).

Almost surely, 2^89789905 is an apocalyptic number.

It is an amenable number.

89789905 is a deficient number, since it is larger than the sum of its proper divisors (17957987).

89789905 is a wasteful number, since it uses less digits than its factorization.

89789905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17957986.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 89789905 is about 9475.7535320417. The cubic root of 89789905 is about 447.7914915790.

The spelling of 89789905 in words is "eighty-nine million, seven hundred eighty-nine thousand, nine hundred five".