82017799 has 2 divisors, whose sum is σ = 82017800. Its totient is φ = 82017798.

The previous prime is 82017787. The next prime is 82017821. The reversal of 82017799 is 99771028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82017799 - 2²¹ = 79920647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82017739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41008899 + 41008900.

It is an arithmetic number, because the mean of its divisors is an integer number (41008900).

Almost surely, 2^82017799 is an apocalyptic number.

82017799 is a deficient number, since it is larger than the sum of its proper divisors (1).

82017799 is an equidigital number, since it uses as much as digits as its factorization.

82017799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 82017799 is about 9056.3678701784. The cubic root of 82017799 is about 434.4795802158.

The spelling of 82017799 in words is "eighty-two million, seventeen thousand, seven hundred ninety-nine".