89121863 has 8 divisors (see below), whose sum is σ = 91665120. Its totient is φ = 86585760.

The previous prime is 89121821. The next prime is 89121887. The reversal of 89121863 is 36812198.

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

It is a cyclic number.

It is not a de Polignac number, because 89121863 - 2⁸ = 89121607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89121163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32693 + ... + 35313.

It is an arithmetic number, because the mean of its divisors is an integer number (11458140).

Almost surely, 2^89121863 is an apocalyptic number.

89121863 is a deficient number, since it is larger than the sum of its proper divisors (2543257).

89121863 is a wasteful number, since it uses less digits than its factorization.

89121863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577.

The product of its digits is 20736, while the sum is 38.

The square root of 89121863 is about 9440.4376487534. The cubic root of 89121863 is about 446.6781946110.

The spelling of 89121863 in words is "eighty-nine million, one hundred twenty-one thousand, eight hundred sixty-three".