89009857 has 4 divisors (see below), whose sum is σ = 89030020. Its totient is φ = 88989696.

The previous prime is 89009821. The next prime is 89009861. The reversal of 89009857 is 75890098.

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 32444416 + 56565441 = 5696^2 + 7521^2 .

It is a cyclic number.

It is not a de Polignac number, because 89009857 - 2¹⁹ = 88485569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89009867) 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 3 ways as a sum of consecutive naturals, for example, 288 + ... + 13345.

It is an arithmetic number, because the mean of its divisors is an integer number (22257505).

Almost surely, 2^89009857 is an apocalyptic number.

It is an amenable number.

89009857 is a deficient number, since it is larger than the sum of its proper divisors (20163).

89009857 is a wasteful number, since it uses less digits than its factorization.

89009857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20162.

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 89009857 is about 9434.5035375477. The cubic root of 89009857 is about 446.4909917187.

The spelling of 89009857 in words is "eighty-nine million, nine thousand, eight hundred fifty-seven".