1979863793 has 4 divisors (see below), whose sum is σ = 2004925440. Its totient is φ = 1954802148.

The previous prime is 1979863777. The next prime is 1979863807. The reversal of 1979863793 is 3973689791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3973689791 = 149 ⋅26669059.

It is a cyclic number.

It is not a de Polignac number, because 1979863793 - 2⁴ = 1979863777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979863723) 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, 12530705 + ... + 12530862.

It is an arithmetic number, because the mean of its divisors is an integer number (501231360).

Almost surely, 2^1979863793 is an apocalyptic number.

It is an amenable number.

1979863793 is a deficient number, since it is larger than the sum of its proper divisors (25061647).

1979863793 is an equidigital number, since it uses as much as digits as its factorization.

1979863793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25061646.

The product of its digits is 15431472, while the sum is 62.

The square root of 1979863793 is about 44495.6603839071. The cubic root of 1979863793 is about 1255.6784410248.

The spelling of 1979863793 in words is "one billion, nine hundred seventy-nine million, eight hundred sixty-three thousand, seven hundred ninety-three".