82604813 has 2 divisors, whose sum is σ = 82604814. Its totient is φ = 82604812.

The previous prime is 82604807. The next prime is 82604827. The reversal of 82604813 is 31840628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71859529 + 10745284 = 8477^2 + 3278^2 .

It is a cyclic number.

It is not a de Polignac number, because 82604813 - 2¹⁰ = 82603789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82604813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82604833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41302406 + 41302407.

It is an arithmetic number, because the mean of its divisors is an integer number (41302407).

Almost surely, 2^82604813 is an apocalyptic number.

It is an amenable number.

82604813 is a deficient number, since it is larger than the sum of its proper divisors (1).

82604813 is an equidigital number, since it uses as much as digits as its factorization.

82604813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 82604813 is about 9088.7189966463. The cubic root of 82604813 is about 435.5136628192.

The spelling of 82604813 in words is "eighty-two million, six hundred four thousand, eight hundred thirteen".