89121865 has 8 divisors (see below), whose sum is σ = 122224320. Its totient is φ = 61112112.

The previous prime is 89121821. The next prime is 89121887. The reversal of 89121865 is 56812198.

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 89121865 - 2⁷ = 89121737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273135 + ... + 1273204.

It is an arithmetic number, because the mean of its divisors is an integer number (15278040).

Almost surely, 2^89121865 is an apocalyptic number.

It is an amenable number.

89121865 is a deficient number, since it is larger than the sum of its proper divisors (33102455).

89121865 is a wasteful number, since it uses less digits than its factorization.

89121865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546351.

The product of its digits is 34560, while the sum is 40.

The square root of 89121865 is about 9440.4377546807. The cubic root of 89121865 is about 446.6781979523.

The spelling of 89121865 in words is "eighty-nine million, one hundred twenty-one thousand, eight hundred sixty-five".