82704991 has 2 divisors, whose sum is σ = 82704992. Its totient is φ = 82704990.

The previous prime is 82704977. The next prime is 82705003. The reversal of 82704991 is 19940728.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82704991 - 2¹⁵ = 82672223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82704911) 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, 41352495 + 41352496.

It is an arithmetic number, because the mean of its divisors is an integer number (41352496).

Almost surely, 2^82704991 is an apocalyptic number.

82704991 is a deficient number, since it is larger than the sum of its proper divisors (1).

82704991 is an equidigital number, since it uses as much as digits as its factorization.

82704991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 82704991 is about 9094.2284444586. The cubic root of 82704991 is about 435.6896463614.

The spelling of 82704991 in words is "eighty-two million, seven hundred four thousand, nine hundred ninety-one".