81498313 has 8 divisors (see below), whose sum is σ = 88460288. Its totient is φ = 74635344.

The previous prime is 81498311. The next prime is 81498343. The reversal of 81498313 is 31389418.

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 81498313 - 2¹ = 81498311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81498311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23031 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (11057536).

Almost surely, 2^81498313 is an apocalyptic number.

It is an amenable number.

81498313 is a deficient number, since it is larger than the sum of its proper divisors (6961975).

81498313 is a wasteful number, since it uses less digits than its factorization.

81498313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49503.

The product of its digits is 20736, while the sum is 37.

The square root of 81498313 is about 9027.6416078619. The cubic root of 81498313 is about 433.5603314954.

The spelling of 81498313 in words is "eighty-one million, four hundred ninety-eight thousand, three hundred thirteen".