82319779 has 2 divisors, whose sum is σ = 82319780. Its totient is φ = 82319778.

The previous prime is 82319753. The next prime is 82319803. The reversal of 82319779 is 97791328.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82319779 - 2¹⁵ = 82287011 is a prime.

It is not a weakly prime, because it can be changed into another prime (82319579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41159889 + 41159890.

It is an arithmetic number, because the mean of its divisors is an integer number (41159890).

Almost surely, 2^82319779 is an apocalyptic number.

82319779 is a deficient number, since it is larger than the sum of its proper divisors (1).

82319779 is an equidigital number, since it uses as much as digits as its factorization.

82319779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 82319779 is about 9073.0247988199. The cubic root of 82319779 is about 435.0121615484.

It can be divided in two parts, 823 and 19779, that added together give a palindrome (20602).

The spelling of 82319779 in words is "eighty-two million, three hundred nineteen thousand, seven hundred seventy-nine".