82637279 has 2 divisors, whose sum is σ = 82637280. Its totient is φ = 82637278.

The previous prime is 82637231. The next prime is 82637297. The reversal of 82637279 is 97273628.

Together with next prime (82637297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82637279 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 (82637299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41318639 + 41318640.

It is an arithmetic number, because the mean of its divisors is an integer number (41318640).

Almost surely, 2^82637279 is an apocalyptic number.

82637279 is a deficient number, since it is larger than the sum of its proper divisors (1).

82637279 is an equidigital number, since it uses as much as digits as its factorization.

82637279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 82637279 is about 9090.5048814684. The cubic root of 82637279 is about 435.5707116927.

The spelling of 82637279 in words is "eighty-two million, six hundred thirty-seven thousand, two hundred seventy-nine".