1988579 has 2 divisors, whose sum is σ = 1988580. Its totient is φ = 1988578.

The previous prime is 1988563. The next prime is 1988587. The reversal of 1988579 is 9758891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988579 - 2⁴ = 1988563 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1988549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994289 + 994290.

It is an arithmetic number, because the mean of its divisors is an integer number (994290).

2^1988579 is an apocalyptic number.

1988579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988579 is an equidigital number, since it uses as much as digits as its factorization.

1988579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 47.

The square root of 1988579 is about 1410.1698479261. The cubic root of 1988579 is about 125.7518210551.

The spelling of 1988579 in words is "one million, nine hundred eighty-eight thousand, five hundred seventy-nine".