1979579 has 4 divisors (see below), whose sum is σ = 2262384. Its totient is φ = 1696776.

The previous prime is 1979573. The next prime is 1979581. The reversal of 1979579 is 9759791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1979579 - 2⁴ = 1979563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141392 + ... + 141405.

It is an arithmetic number, because the mean of its divisors is an integer number (565596).

2^1979579 is an apocalyptic number.

1979579 is a deficient number, since it is larger than the sum of its proper divisors (282805).

1979579 is an equidigital number, since it uses as much as digits as its factorization.

1979579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282804.

The product of its digits is 178605, while the sum is 47.

The square root of 1979579 is about 1406.9751241582. The cubic root of 1979579 is about 125.5618230556.

The spelling of 1979579 in words is "one million, nine hundred seventy-nine thousand, five hundred seventy-nine".