89521111 has 4 divisors (see below), whose sum is σ = 90390352. Its totient is φ = 88651872.

The previous prime is 89521109. The next prime is 89521121. The reversal of 89521111 is 11112598.

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

It is a cyclic number.

It is not a de Polignac number, because 89521111 - 2¹ = 89521109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89521111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89521121) 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, 434466 + ... + 434671.

It is an arithmetic number, because the mean of its divisors is an integer number (22597588).

Almost surely, 2^89521111 is an apocalyptic number.

89521111 is a deficient number, since it is larger than the sum of its proper divisors (869241).

89521111 is a wasteful number, since it uses less digits than its factorization.

89521111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869240.

The product of its digits is 720, while the sum is 28.

The square root of 89521111 is about 9461.5596494447. The cubic root of 89521111 is about 447.3442105150.

The spelling of 89521111 in words is "eighty-nine million, five hundred twenty-one thousand, one hundred eleven".