82731247 has 2 divisors, whose sum is σ = 82731248. Its totient is φ = 82731246.

The previous prime is 82731241. The next prime is 82731331. The reversal of 82731247 is 74213728.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82731247 - 2¹⁵ = 82698479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82731241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41365623 + 41365624.

It is an arithmetic number, because the mean of its divisors is an integer number (41365624).

Almost surely, 2^82731247 is an apocalyptic number.

82731247 is a deficient number, since it is larger than the sum of its proper divisors (1).

82731247 is an equidigital number, since it uses as much as digits as its factorization.

82731247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 82731247 is about 9095.6718828243. The cubic root of 82731247 is about 435.7357469932.

The spelling of 82731247 in words is "eighty-two million, seven hundred thirty-one thousand, two hundred forty-seven".