89169861 has 24 divisors (see below), whose sum is σ = 132859552. Its totient is φ = 53143200.

The previous prime is 89169853. The next prime is 89169893. The reversal of 89169861 is 16896198.

It is not a de Polignac number, because 89169861 - 2³ = 89169853 is a prime.

It is a super-2 number, since 2×89169861² = 15902528221518642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89169861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89169061) 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, 20130 + ... + 24156.

Almost surely, 2^89169861 is an apocalyptic number.

It is an amenable number.

89169861 is a deficient number, since it is larger than the sum of its proper divisors (43689691).

89169861 is a wasteful number, since it uses less digits than its factorization.

89169861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113 (or 4102 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 89169861 is about 9442.9794556591. The cubic root of 89169861 is about 446.7583687738.

The spelling of 89169861 in words is "eighty-nine million, one hundred sixty-nine thousand, eight hundred sixty-one".