82279913 has 2 divisors, whose sum is σ = 82279914. Its totient is φ = 82279912.

The previous prime is 82279909. The next prime is 82279919. The reversal of 82279913 is 31997228.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70425664 + 11854249 = 8392^2 + 3443^2 .

It is a cyclic number.

It is not a de Polignac number, because 82279913 - 2² = 82279909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (82279919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41139956 + 41139957.

It is an arithmetic number, because the mean of its divisors is an integer number (41139957).

Almost surely, 2^82279913 is an apocalyptic number.

It is an amenable number.

82279913 is a deficient number, since it is larger than the sum of its proper divisors (1).

82279913 is an equidigital number, since it uses as much as digits as its factorization.

82279913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 82279913 is about 9070.8275807668. The cubic root of 82279913 is about 434.9419273337.

The spelling of 82279913 in words is "eighty-two million, two hundred seventy-nine thousand, nine hundred thirteen".