81046329 has 48 divisors (see below), whose sum is σ = 138133632. Its totient is φ = 41158656.

The previous prime is 81046291. The next prime is 81046333. The reversal of 81046329 is 92364018.

It is not a de Polignac number, because 81046329 - 2¹¹ = 81044281 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81046329.

It is not an unprimeable number, because it can be changed into a prime (81046379) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 229417 + ... + 229769.

It is an arithmetic number, because the mean of its divisors is an integer number (2877784).

Almost surely, 2^81046329 is an apocalyptic number.

It is an amenable number.

81046329 is a deficient number, since it is larger than the sum of its proper divisors (57087303).

81046329 is a wasteful number, since it uses less digits than its factorization.

81046329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 81046329 is about 9002.5734654042. The cubic root of 81046329 is about 432.7573467036.

The spelling of 81046329 in words is "eighty-one million, forty-six thousand, three hundred twenty-nine".