82118479 has 4 divisors (see below), whose sum is σ = 82194840. Its totient is φ = 82042120.

The previous prime is 82118461. The next prime is 82118521. The reversal of 82118479 is 97481128.

It is a happy number.

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-82118479 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82112479) 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, 36544 + ... + 38725.

It is an arithmetic number, because the mean of its divisors is an integer number (20548710).

Almost surely, 2^82118479 is an apocalyptic number.

82118479 is a deficient number, since it is larger than the sum of its proper divisors (76361).

82118479 is a wasteful number, since it uses less digits than its factorization.

82118479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76360.

The product of its digits is 32256, while the sum is 40.

The square root of 82118479 is about 9061.9246851869. The cubic root of 82118479 is about 434.6572876482.

The spelling of 82118479 in words is "eighty-two million, one hundred eighteen thousand, four hundred seventy-nine".