82118459 has 4 divisors (see below), whose sum is σ = 84950160. Its totient is φ = 79286760.

The previous prime is 82118423. The next prime is 82118461. The reversal of 82118459 is 95481128.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82118459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82115459) 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, 1415807 + ... + 1415864.

It is an arithmetic number, because the mean of its divisors is an integer number (21237540).

Almost surely, 2^82118459 is an apocalyptic number.

82118459 is a deficient number, since it is larger than the sum of its proper divisors (2831701).

82118459 is a wasteful number, since it uses less digits than its factorization.

82118459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831700.

The product of its digits is 23040, while the sum is 38.

The square root of 82118459 is about 9061.9235816685. The cubic root of 82118459 is about 434.6572523612.

The spelling of 82118459 in words is "eighty-two million, one hundred eighteen thousand, four hundred fifty-nine".