82087799 has 2 divisors, whose sum is σ = 82087800. Its totient is φ = 82087798.

The previous prime is 82087787. The next prime is 82087813. The reversal of 82087799 is 99778028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82087799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82087729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41043899 + 41043900.

It is an arithmetic number, because the mean of its divisors is an integer number (41043900).

Almost surely, 2^82087799 is an apocalyptic number.

82087799 is a deficient number, since it is larger than the sum of its proper divisors (1).

82087799 is an equidigital number, since it uses as much as digits as its factorization.

82087799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 82087799 is about 9060.2317299283. The cubic root of 82087799 is about 434.6031506387.

The spelling of 82087799 in words is "eighty-two million, eighty-seven thousand, seven hundred ninety-nine".