89421765 has 16 divisors (see below), whose sum is σ = 143408448. Its totient is φ = 47580416.

The previous prime is 89421737. The next prime is 89421767. The reversal of 89421765 is 56712498.

It is a cyclic number.

It is not a de Polignac number, because 89421765 - 2⁹ = 89421253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89421767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84 + ... + 13373.

It is an arithmetic number, because the mean of its divisors is an integer number (8963028).

Almost surely, 2^89421765 is an apocalyptic number.

It is an amenable number.

89421765 is a deficient number, since it is larger than the sum of its proper divisors (53986683).

89421765 is a wasteful number, since it uses less digits than its factorization.

89421765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13908.

The product of its digits is 120960, while the sum is 42.

The square root of 89421765 is about 9456.3082119821. The cubic root of 89421765 is about 447.1786692724.

The spelling of 89421765 in words is "eighty-nine million, four hundred twenty-one thousand, seven hundred sixty-five".