1992271979 has 4 divisors (see below), whose sum is σ = 2003788176. Its totient is φ = 1980755784.

The previous prime is 1992271951. The next prime is 1992272011. The reversal of 1992271979 is 9791722991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9791722991 = 9661 ⋅1013531.

It is a cyclic number.

It is not a de Polignac number, because 1992271979 - 2¹⁶ = 1992206443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992271949) 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, 5757839 + ... + 5758184.

It is an arithmetic number, because the mean of its divisors is an integer number (500947044).

Almost surely, 2^1992271979 is an apocalyptic number.

1992271979 is a deficient number, since it is larger than the sum of its proper divisors (11516197).

1992271979 is a wasteful number, since it uses less digits than its factorization.

1992271979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11516196.

The product of its digits is 1285956, while the sum is 56.

The square root of 1992271979 is about 44634.8740224502. The cubic root of 1992271979 is about 1258.2961725246.

The spelling of 1992271979 in words is "one billion, nine hundred ninety-two million, two hundred seventy-one thousand, nine hundred seventy-nine".