82572239 has 2 divisors, whose sum is σ = 82572240. Its totient is φ = 82572238.

The previous prime is 82572227. The next prime is 82572257. The reversal of 82572239 is 93227528.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82572239 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82572439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41286119 + 41286120.

It is an arithmetic number, because the mean of its divisors is an integer number (41286120).

Almost surely, 2^82572239 is an apocalyptic number.

82572239 is a deficient number, since it is larger than the sum of its proper divisors (1).

82572239 is an equidigital number, since it uses as much as digits as its factorization.

82572239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 82572239 is about 9086.9268182373. The cubic root of 82572239 is about 435.4564091448.

The spelling of 82572239 in words is "eighty-two million, five hundred seventy-two thousand, two hundred thirty-nine".