81298337 has 16 divisors (see below), whose sum is σ = 87183360. Its totient is φ = 75675600.

The previous prime is 81298313. The next prime is 81298351. The reversal of 81298337 is 73389218.

It is a cyclic number.

It is not a de Polignac number, because 81298337 - 2⁸ = 81298081 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 81298294 and 81298303.

It is not an unprimeable number, because it can be changed into a prime (81298387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94214 + ... + 95072.

It is an arithmetic number, because the mean of its divisors is an integer number (5448960).

Almost surely, 2^81298337 is an apocalyptic number.

It is an amenable number.

81298337 is a deficient number, since it is larger than the sum of its proper divisors (5885023).

81298337 is a wasteful number, since it uses less digits than its factorization.

81298337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its digits is 72576, while the sum is 41.

The square root of 81298337 is about 9016.5590443361. The cubic root of 81298337 is about 433.2054256941.

The spelling of 81298337 in words is "eighty-one million, two hundred ninety-eight thousand, three hundred thirty-seven".