82640263 has 2 divisors, whose sum is σ = 82640264. Its totient is φ = 82640262.

The previous prime is 82640251. The next prime is 82640287. The reversal of 82640263 is 36204628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82640263 - 2⁵ = 82640231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82640563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41320131 + 41320132.

It is an arithmetic number, because the mean of its divisors is an integer number (41320132).

Almost surely, 2^82640263 is an apocalyptic number.

82640263 is a deficient number, since it is larger than the sum of its proper divisors (1).

82640263 is an equidigital number, since it uses as much as digits as its factorization.

82640263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 82640263 is about 9090.6690072843. The cubic root of 82640263 is about 435.5759543926.

The spelling of 82640263 in words is "eighty-two million, six hundred forty thousand, two hundred sixty-three".