81683229 has 8 divisors (see below), whose sum is σ = 110966112. Its totient is φ = 53427920.

The previous prime is 81683219. The next prime is 81683237. The reversal of 81683229 is 92238618.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81683229 - 2⁸ = 81682973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81683219) 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, 256707 + ... + 257024.

It is an arithmetic number, because the mean of its divisors is an integer number (13870764).

Almost surely, 2^81683229 is an apocalyptic number.

It is an amenable number.

81683229 is a deficient number, since it is larger than the sum of its proper divisors (29282883).

81683229 is a wasteful number, since it uses less digits than its factorization.

81683229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513787.

The product of its digits is 41472, while the sum is 39.

The square root of 81683229 is about 9037.8774609971. The cubic root of 81683229 is about 433.8879934224.

The spelling of 81683229 in words is "eighty-one million, six hundred eighty-three thousand, two hundred twenty-nine".