89181643 has 6 divisors (see below), whose sum is σ = 94736516. Its totient is φ = 83935392.

The previous prime is 89181629. The next prime is 89181647. The reversal of 89181643 is 34618198.

It is a de Polignac number, because none of the positive numbers 2^k-89181643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89181596 and 89181605.

It is not an unprimeable number, because it can be changed into a prime (89181647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154005 + ... + 154582.

Almost surely, 2^89181643 is an apocalyptic number.

89181643 is a deficient number, since it is larger than the sum of its proper divisors (5554873).

89181643 is a wasteful number, since it uses less digits than its factorization.

89181643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308621 (or 308604 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 89181643 is about 9443.6032847637. The cubic root of 89181643 is about 446.7780446120.

The spelling of 89181643 in words is "eighty-nine million, one hundred eighty-one thousand, six hundred forty-three".