82418813 has 2 divisors, whose sum is σ = 82418814. Its totient is φ = 82418812.

The previous prime is 82418797. The next prime is 82418851. The reversal of 82418813 is 31881428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77915929 + 4502884 = 8827^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 82418813 - 2⁴ = 82418797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82417813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41209406 + 41209407.

It is an arithmetic number, because the mean of its divisors is an integer number (41209407).

Almost surely, 2^82418813 is an apocalyptic number.

It is an amenable number.

82418813 is a deficient number, since it is larger than the sum of its proper divisors (1).

82418813 is an equidigital number, since it uses as much as digits as its factorization.

82418813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 35.

The square root of 82418813 is about 9078.4807649738. The cubic root of 82418813 is about 435.1865373400.

The spelling of 82418813 in words is "eighty-two million, four hundred eighteen thousand, eight hundred thirteen".