89121857 has 8 divisors (see below), whose sum is σ = 98085600. Its totient is φ = 80301760.

The previous prime is 89121821. The next prime is 89121887. The reversal of 89121857 is 75812198.

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

It is not a de Polignac number, because 89121857 - 2¹⁶ = 89056321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89121887) by changing a digit.

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, 34607 + ... + 37092.

It is an arithmetic number, because the mean of its divisors is an integer number (12260700).

Almost surely, 2^89121857 is an apocalyptic number.

It is an amenable number.

89121857 is a deficient number, since it is larger than the sum of its proper divisors (8963743).

89121857 is a wasteful number, since it uses less digits than its factorization.

89121857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71823.

The product of its digits is 40320, while the sum is 41.

The square root of 89121857 is about 9440.4373309715. The cubic root of 89121857 is about 446.6781845870.

The spelling of 89121857 in words is "eighty-nine million, one hundred twenty-one thousand, eight hundred fifty-seven".