81418483 has 4 divisors (see below), whose sum is σ = 81457488. Its totient is φ = 81379480.

The previous prime is 81418481. The next prime is 81418487. The reversal of 81418483 is 38481418.

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 81418483 - 2¹ = 81418481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81418481) 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, 16183 + ... + 20608.

It is an arithmetic number, because the mean of its divisors is an integer number (20364372).

Almost surely, 2^81418483 is an apocalyptic number.

81418483 is a deficient number, since it is larger than the sum of its proper divisors (39005).

81418483 is a wasteful number, since it uses less digits than its factorization.

81418483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39004.

The product of its digits is 24576, while the sum is 37.

The square root of 81418483 is about 9023.2191040670. The cubic root of 81418483 is about 433.4187235406.

The spelling of 81418483 in words is "eighty-one million, four hundred eighteen thousand, four hundred eighty-three".