89169999 has 4 divisors (see below), whose sum is σ = 118893336. Its totient is φ = 59446664.

The previous prime is 89169973. The next prime is 89170001. The reversal of 89169999 is 99996198.

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 89169999 - 2⁵ = 89169967 is a prime.

89169999 is a modest number, since divided by 9999 gives 8916 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89169959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14861664 + ... + 14861669.

It is an arithmetic number, because the mean of its divisors is an integer number (29723334).

Almost surely, 2^89169999 is an apocalyptic number.

89169999 is a deficient number, since it is larger than the sum of its proper divisors (29723337).

89169999 is a wasteful number, since it uses less digits than its factorization.

89169999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29723336.

The product of its digits is 2834352, while the sum is 60.

The square root of 89169999 is about 9442.9867626721. The cubic root of 89169999 is about 446.7585992426.

It can be divided in two parts, 8916 and 9999, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 89169999 in words is "eighty-nine million, one hundred sixty-nine thousand, nine hundred ninety-nine".