1979845379 has 4 divisors (see below), whose sum is σ = 1979944176. Its totient is φ = 1979746584.

The previous prime is 1979845367. The next prime is 1979845393. The reversal of 1979845379 is 9735489791.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9735489791 = 509 ⋅19126699.

It is a cyclic number.

It is not a de Polignac number, because 1979845379 - 2⁴ = 1979845363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979845319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7484 + ... + 63369.

It is an arithmetic number, because the mean of its divisors is an integer number (494986044).

Almost surely, 2^1979845379 is an apocalyptic number.

1979845379 is a deficient number, since it is larger than the sum of its proper divisors (98797).

1979845379 is an equidigital number, since it uses as much as digits as its factorization.

1979845379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98796.

The product of its digits is 17146080, while the sum is 62.

The square root of 1979845379 is about 44495.4534643709. The cubic root of 1979845379 is about 1255.6745481417.

The spelling of 1979845379 in words is "one billion, nine hundred seventy-nine million, eight hundred forty-five thousand, three hundred seventy-nine".