81094869 has 24 divisors (see below), whose sum is σ = 123739200. Its totient is φ = 51036480.

The previous prime is 81094847. The next prime is 81094873. The reversal of 81094869 is 96849018.

It is not a de Polignac number, because 81094869 - 2⁸ = 81094613 is a prime.

It is a super-2 number, since 2×81094869² = 13152755556254322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81098869) 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, 60729 + ... + 62049.

It is an arithmetic number, because the mean of its divisors is an integer number (5155800).

Almost surely, 2^81094869 is an apocalyptic number.

It is an amenable number.

81094869 is a deficient number, since it is larger than the sum of its proper divisors (42644331).

81094869 is a wasteful number, since it uses less digits than its factorization.

81094869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 81094869 is about 9005.2689576714. The cubic root of 81094869 is about 432.8437246624.

The spelling of 81094869 in words is "eighty-one million, ninety-four thousand, eight hundred sixty-nine".