89661111 has 24 divisors (see below), whose sum is σ = 128755440. Its totient is φ = 55302912.

The previous prime is 89661109. The next prime is 89661113. The reversal of 89661111 is 11116698.

It is an interprime number because it is at equal distance from previous prime (89661109) and next prime (89661113).

It is not a de Polignac number, because 89661111 - 2¹ = 89661109 is a prime.

It is a super-2 number, since 2×89661111² = 16078229651508642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89661113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 705930 + ... + 706056.

It is an arithmetic number, because the mean of its divisors is an integer number (5364810).

Almost surely, 2^89661111 is an apocalyptic number.

89661111 is a deficient number, since it is larger than the sum of its proper divisors (39094329).

89661111 is a wasteful number, since it uses less digits than its factorization.

89661111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 256 counting only the distinct ones).

The product of its digits is 2592, while the sum is 33.

The square root of 89661111 is about 9468.9551165902. The cubic root of 89661111 is about 447.5772861531.

The spelling of 89661111 in words is "eighty-nine million, six hundred sixty-one thousand, one hundred eleven".