82503809 has 2 divisors, whose sum is σ = 82503810. Its totient is φ = 82503808.

The previous prime is 82503793. The next prime is 82503851. The reversal of 82503809 is 90830528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 26553409 = 7480^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 82503809 - 2⁴ = 82503793 is a prime.

It is not a weakly prime, because it can be changed into another prime (82503209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41251904 + 41251905.

It is an arithmetic number, because the mean of its divisors is an integer number (41251905).

Almost surely, 2^82503809 is an apocalyptic number.

It is an amenable number.

82503809 is a deficient number, since it is larger than the sum of its proper divisors (1).

82503809 is an equidigital number, since it uses as much as digits as its factorization.

82503809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 82503809 is about 9083.1607384214. The cubic root of 82503809 is about 435.3360841308.

The spelling of 82503809 in words is "eighty-two million, five hundred three thousand, eight hundred nine".