82390579 has 2 divisors, whose sum is σ = 82390580. Its totient is φ = 82390578.

The previous prime is 82390573. The next prime is 82390597. The reversal of 82390579 is 97509328.

It is a happy number.

Together with next prime (82390597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82390579 - 2³ = 82390571 is a prime.

It is not a weakly prime, because it can be changed into another prime (82390571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41195289 + 41195290.

It is an arithmetic number, because the mean of its divisors is an integer number (41195290).

Almost surely, 2^82390579 is an apocalyptic number.

82390579 is a deficient number, since it is larger than the sum of its proper divisors (1).

82390579 is an equidigital number, since it uses as much as digits as its factorization.

82390579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 82390579 is about 9076.9256359188. The cubic root of 82390579 is about 435.1368380883.

The spelling of 82390579 in words is "eighty-two million, three hundred ninety thousand, five hundred seventy-nine".