81834099 has 8 divisors (see below), whose sum is σ = 110427072. Its totient is φ = 53898600.

The previous prime is 81834091. The next prime is 81834113. The reversal of 81834099 is 99043818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81834099 - 2³ = 81834091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81834099.

It is not an unprimeable number, because it can be changed into a prime (81834091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164077 + ... + 164574.

It is an arithmetic number, because the mean of its divisors is an integer number (13803384).

Almost surely, 2^81834099 is an apocalyptic number.

81834099 is a deficient number, since it is larger than the sum of its proper divisors (28592973).

81834099 is a wasteful number, since it uses less digits than its factorization.

81834099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328737.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 81834099 is about 9046.2201498748. The cubic root of 81834099 is about 434.1549614052.

The spelling of 81834099 in words is "eighty-one million, eight hundred thirty-four thousand, ninety-nine".