1979249579 has 4 divisors (see below), whose sum is σ = 1996765176. Its totient is φ = 1961733984.

The previous prime is 1979249561. The next prime is 1979249611. The reversal of 1979249579 is 9759429791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9759429791 = 571 ⋅17091821.

It is a cyclic number.

It is not a de Polignac number, because 1979249579 - 2¹² = 1979245483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979246579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8757629 + ... + 8757854.

It is an arithmetic number, because the mean of its divisors is an integer number (499191294).

Almost surely, 2^1979249579 is an apocalyptic number.

1979249579 is a deficient number, since it is larger than the sum of its proper divisors (17515597).

1979249579 is a wasteful number, since it uses less digits than its factorization.

1979249579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17515596.

The product of its digits is 12859560, while the sum is 62.

The square root of 1979249579 is about 44488.7578945513. The cubic root of 1979249579 is about 1255.5485777062.

The spelling of 1979249579 in words is "one billion, nine hundred seventy-nine million, two hundred forty-nine thousand, five hundred seventy-nine".