1979452811 has 4 divisors (see below), whose sum is σ = 2262231792. Its totient is φ = 1696673832.

The previous prime is 1979452771. The next prime is 1979452829. The reversal of 1979452811 is 1182549791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1182549791 = 29 ⋅40777579.

It is not a de Polignac number, because 1979452811 - 2³⁰ = 905710987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979452831) 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, 141389480 + ... + 141389493.

It is an arithmetic number, because the mean of its divisors is an integer number (565557948).

Almost surely, 2^1979452811 is an apocalyptic number.

1979452811 is a deficient number, since it is larger than the sum of its proper divisors (282778981).

1979452811 is an equidigital number, since it uses as much as digits as its factorization.

1979452811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282778980.

The product of its digits is 181440, while the sum is 47.

The square root of 1979452811 is about 44491.0419185705. The cubic root of 1979452811 is about 1255.5915500391.

The spelling of 1979452811 in words is "one billion, nine hundred seventy-nine million, four hundred fifty-two thousand, eight hundred eleven".