82491719 has 2 divisors, whose sum is σ = 82491720. Its totient is φ = 82491718.

The previous prime is 82491677. The next prime is 82491733. The reversal of 82491719 is 91719428.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82491719 is a prime.

It is a super-2 number, since 2×82491719² = 13609767407149922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82491779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41245859 + 41245860.

It is an arithmetic number, because the mean of its divisors is an integer number (41245860).

Almost surely, 2^82491719 is an apocalyptic number.

82491719 is a deficient number, since it is larger than the sum of its proper divisors (1).

82491719 is an equidigital number, since it uses as much as digits as its factorization.

82491719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 82491719 is about 9082.4951968058. The cubic root of 82491719 is about 435.3148185657.

The spelling of 82491719 in words is "eighty-two million, four hundred ninety-one thousand, seven hundred nineteen".