89161965 has 40 divisors (see below), whose sum is σ = 168257760. Its totient is φ = 45046368.

The previous prime is 89161939. The next prime is 89161973. The reversal of 89161965 is 56916198.

It is not a de Polignac number, because 89161965 - 2¹⁰ = 89160941 is a prime.

It is a super-2 number, since 2×89161965² = 15899712005322450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 89161965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1902 + ... + 13488.

It is an arithmetic number, because the mean of its divisors is an integer number (4206444).

Almost surely, 2^89161965 is an apocalyptic number.

It is an amenable number.

89161965 is a deficient number, since it is larger than the sum of its proper divisors (79095795).

89161965 is a wasteful number, since it uses less digits than its factorization.

89161965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11623 (or 11614 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 89161965 is about 9442.5613580215. The cubic root of 89161965 is about 446.7451815520.

The spelling of 89161965 in words is "eighty-nine million, one hundred sixty-one thousand, nine hundred sixty-five".