1979479394905 has 8 divisors (see below), whose sum is σ = 2375384544000. Its totient is φ = 1583577335856.

The previous prime is 1979479394873. The next prime is 1979479394911. The reversal of 1979479394905 is 5094939749791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1979479394905 - 2⁵ = 1979479394873 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011246 + ... + 2231944.

It is an arithmetic number, because the mean of its divisors is an integer number (296923068000).

Almost surely, 2^{1979479394905} is an apocalyptic number.

It is an amenable number.

1979479394905 is a deficient number, since it is larger than the sum of its proper divisors (395905149095).

1979479394905 is a wasteful number, since it uses less digits than its factorization.

1979479394905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545023.

The product of its (nonzero) digits is 694416240, while the sum is 76.

The spelling of 1979479394905 in words is "one trillion, nine hundred seventy-nine billion, four hundred seventy-nine million, three hundred ninety-four thousand, nine hundred five".