1979563 has 2 divisors, whose sum is σ = 1979564. Its totient is φ = 1979562.

The previous prime is 1979543. The next prime is 1979573. The reversal of 1979563 is 3659791.

It is a strong prime.

It is an emirp because it is prime and its reverse (3659791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1979563 - 2⁹ = 1979051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1979543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989781 + 989782.

It is an arithmetic number, because the mean of its divisors is an integer number (989782).

2^1979563 is an apocalyptic number.

1979563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979563 is an equidigital number, since it uses as much as digits as its factorization.

1979563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 40.

The square root of 1979563 is about 1406.9694381898. The cubic root of 1979563 is about 125.5614847691.

The spelling of 1979563 in words is "one million, nine hundred seventy-nine thousand, five hundred sixty-three".