82373209 has 2 divisors, whose sum is σ = 82373210. Its totient is φ = 82373208.

The previous prime is 82373197. The next prime is 82373219. The reversal of 82373209 is 90237328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50979600 + 31393609 = 7140^2 + 5603^2 .

It is a cyclic number.

It is not a de Polignac number, because 82373209 - 2¹⁵ = 82340441 is a prime.

It is not a weakly prime, because it can be changed into another prime (82373219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41186604 + 41186605.

It is an arithmetic number, because the mean of its divisors is an integer number (41186605).

Almost surely, 2^82373209 is an apocalyptic number.

It is an amenable number.

82373209 is a deficient number, since it is larger than the sum of its proper divisors (1).

82373209 is an equidigital number, since it uses as much as digits as its factorization.

82373209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 82373209 is about 9075.9687637188. The cubic root of 82373209 is about 435.1062566869.

The spelling of 82373209 in words is "eighty-two million, three hundred seventy-three thousand, two hundred nine".