82368991 has 2 divisors, whose sum is σ = 82368992. Its totient is φ = 82368990.

The previous prime is 82368931. The next prime is 82369031. The reversal of 82368991 is 19986328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82368991 - 2⁹ = 82368479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82368931) 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, 41184495 + 41184496.

It is an arithmetic number, because the mean of its divisors is an integer number (41184496).

Almost surely, 2^82368991 is an apocalyptic number.

82368991 is a deficient number, since it is larger than the sum of its proper divisors (1).

82368991 is an equidigital number, since it uses as much as digits as its factorization.

82368991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 82368991 is about 9075.7363888557. The cubic root of 82368991 is about 435.0988298809.

It can be divided in two parts, 8236899 and 1, that added together give a square (8236900 = 2870²).

The spelling of 82368991 in words is "eighty-two million, three hundred sixty-eight thousand, nine hundred ninety-one".