82639393 has 2 divisors, whose sum is σ = 82639394. Its totient is φ = 82639392.

The previous prime is 82639387. The next prime is 82639399. The reversal of 82639393 is 39393628.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (82639387) and next prime (82639399).

It can be written as a sum of positive squares in only one way, i.e., 81216144 + 1423249 = 9012^2 + 1193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82639393 is a prime.

It is not a weakly prime, because it can be changed into another prime (82639399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41319696 + 41319697.

It is an arithmetic number, because the mean of its divisors is an integer number (41319697).

Almost surely, 2^82639393 is an apocalyptic number.

It is an amenable number.

82639393 is a deficient number, since it is larger than the sum of its proper divisors (1).

82639393 is an equidigital number, since it uses as much as digits as its factorization.

82639393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 82639393 is about 9090.6211558947. The cubic root of 82639393 is about 435.5744258705.

The spelling of 82639393 in words is "eighty-two million, six hundred thirty-nine thousand, three hundred ninety-three".