89858021 has 4 divisors (see below), whose sum is σ = 98026944. Its totient is φ = 81689100.

The previous prime is 89857991. The next prime is 89858023. The reversal of 89858021 is 12085898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89858021 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 89858021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89858023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084445 + ... + 4084466.

It is an arithmetic number, because the mean of its divisors is an integer number (24506736).

Almost surely, 2^89858021 is an apocalyptic number.

It is an amenable number.

89858021 is a deficient number, since it is larger than the sum of its proper divisors (8168923).

89858021 is a wasteful number, since it uses less digits than its factorization.

89858021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168922.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 89858021 is about 9479.3470766715. The cubic root of 89858021 is about 447.9046967902.

The spelling of 89858021 in words is "eighty-nine million, eight hundred fifty-eight thousand, twenty-one".