81297483 has 4 divisors (see below), whose sum is σ = 108396648. Its totient is φ = 54198320.

The previous prime is 81297481. The next prime is 81297487. The reversal of 81297483 is 38479218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81297483 - 2¹ = 81297481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81297481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13549578 + ... + 13549583.

It is an arithmetic number, because the mean of its divisors is an integer number (27099162).

Almost surely, 2^81297483 is an apocalyptic number.

81297483 is a deficient number, since it is larger than the sum of its proper divisors (27099165).

81297483 is a wasteful number, since it uses less digits than its factorization.

81297483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27099164.

The product of its digits is 96768, while the sum is 42.

The square root of 81297483 is about 9016.5116868998. The cubic root of 81297483 is about 433.2039088171.

The spelling of 81297483 in words is "eighty-one million, two hundred ninety-seven thousand, four hundred eighty-three".