1979379871 has 4 divisors (see below), whose sum is σ = 2262148432. Its totient is φ = 1696611312.

The previous prime is 1979379841. The next prime is 1979379881. The reversal of 1979379871 is 1789739791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1789739791 = 7 ⋅255677113.

It is a cyclic number.

It is not a de Polignac number, because 1979379871 - 2¹¹ = 1979377823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979379841) 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, 141384270 + ... + 141384283.

It is an arithmetic number, because the mean of its divisors is an integer number (565537108).

Almost surely, 2^1979379871 is an apocalyptic number.

1979379871 is a deficient number, since it is larger than the sum of its proper divisors (282768561).

1979379871 is an equidigital number, since it uses as much as digits as its factorization.

1979379871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282768560.

The product of its digits is 6001128, while the sum is 61.

The square root of 1979379871 is about 44490.2221954442. Note that the first 3 decimals coincide. The cubic root of 1979379871 is about 1255.5761275998.

The spelling of 1979379871 in words is "one billion, nine hundred seventy-nine million, three hundred seventy-nine thousand, eight hundred seventy-one".