82805413 has 2 divisors, whose sum is σ = 82805414. Its totient is φ = 82805412.

The previous prime is 82805381. The next prime is 82805449. The reversal of 82805413 is 31450828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81324324 + 1481089 = 9018^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 82805413 - 2⁵ = 82805381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82808413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41402706 + 41402707.

It is an arithmetic number, because the mean of its divisors is an integer number (41402707).

Almost surely, 2^82805413 is an apocalyptic number.

It is an amenable number.

82805413 is a deficient number, since it is larger than the sum of its proper divisors (1).

82805413 is an equidigital number, since it uses as much as digits as its factorization.

82805413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 82805413 is about 9099.7479635427. The cubic root of 82805413 is about 435.8659159696.

The spelling of 82805413 in words is "eighty-two million, eight hundred five thousand, four hundred thirteen".