1979448689 has 4 divisors (see below), whose sum is σ = 2007328320. Its totient is φ = 1951569060.

The previous prime is 1979448683. The next prime is 1979448697. The reversal of 1979448689 is 9868449791.

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.

It is a cyclic number.

It is not a de Polignac number, because 1979448689 - 2⁸ = 1979448433 is a prime.

It is a super-2 number, since 2×1979448689² = 7836434224767637442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979448683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13939709 + ... + 13939850.

It is an arithmetic number, because the mean of its divisors is an integer number (501832080).

Almost surely, 2^1979448689 is an apocalyptic number.

It is an amenable number.

1979448689 is a deficient number, since it is larger than the sum of its proper divisors (27879631).

1979448689 is an equidigital number, since it uses as much as digits as its factorization.

1979448689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27879630.

The product of its digits is 31352832, while the sum is 65.

The square root of 1979448689 is about 44490.9955946144. The cubic root of 1979448689 is about 1255.5906784932.

The spelling of 1979448689 in words is "one billion, nine hundred seventy-nine million, four hundred forty-eight thousand, six hundred eighty-nine".