1982579 has 2 divisors, whose sum is σ = 1982580. Its totient is φ = 1982578.

The previous prime is 1982573. The next prime is 1982587. The reversal of 1982579 is 9752891.

It is a weak prime.

It is an emirp because it is prime and its reverse (9752891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1982573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991289 + 991290.

It is an arithmetic number, because the mean of its divisors is an integer number (991290).

2^1982579 is an apocalyptic number.

1982579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982579 is an equidigital number, since it uses as much as digits as its factorization.

1982579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 1982579 is about 1408.0408374760. The cubic root of 1982579 is about 125.6252195899.

The spelling of 1982579 in words is "one million, nine hundred eighty-two thousand, five hundred seventy-nine".