89211805 has 8 divisors (see below), whose sum is σ = 108002232. Its totient is φ = 70737408.

The previous prime is 89211791. The next prime is 89211827. The reversal of 89211805 is 50811298.

It can be written as a sum of positive squares in 4 ways, for example, as 2013561 + 87198244 = 1419^2 + 9338^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 89211805 - 2⁷ = 89211677 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 78384 + ... + 79513.

It is an arithmetic number, because the mean of its divisors is an integer number (13500279).

Almost surely, 2^89211805 is an apocalyptic number.

It is an amenable number.

89211805 is a deficient number, since it is larger than the sum of its proper divisors (18790427).

89211805 is a wasteful number, since it uses less digits than its factorization.

89211805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158015.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 89211805 is about 9445.2001037564. The cubic root of 89211805 is about 446.8284069961.

The spelling of 89211805 in words is "eighty-nine million, two hundred eleven thousand, eight hundred five".