89665487 has 4 divisors (see below), whose sum is σ = 89686200. Its totient is φ = 89644776.

The previous prime is 89665451. The next prime is 89665549. The reversal of 89665487 is 78456698.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 89665487 - 2⁸ = 89665231 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 (89665787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112 + ... + 13437.

It is an arithmetic number, because the mean of its divisors is an integer number (22421550).

Almost surely, 2^89665487 is an apocalyptic number.

89665487 is a deficient number, since it is larger than the sum of its proper divisors (20713).

89665487 is a wasteful number, since it uses less digits than its factorization.

89665487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20712.

The product of its digits is 2903040, while the sum is 53.

The square root of 89665487 is about 9469.1861846729. The cubic root of 89665487 is about 447.5845675200.

The spelling of 89665487 in words is "eighty-nine million, six hundred sixty-five thousand, four hundred eighty-seven".