82501579 has 2 divisors, whose sum is σ = 82501580. Its totient is φ = 82501578.

The previous prime is 82501577. The next prime is 82501597. The reversal of 82501579 is 97510528.

Together with next prime (82501597) 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 82501579 - 2¹ = 82501577 is a prime.

Together with 82501577, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82501577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41250789 + 41250790.

It is an arithmetic number, because the mean of its divisors is an integer number (41250790).

Almost surely, 2^82501579 is an apocalyptic number.

82501579 is a deficient number, since it is larger than the sum of its proper divisors (1).

82501579 is an equidigital number, since it uses as much as digits as its factorization.

82501579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 82501579 is about 9083.0379829658. The cubic root of 82501579 is about 435.3321618545.

The spelling of 82501579 in words is "eighty-two million, five hundred one thousand, five hundred seventy-nine".