1979143489 has 8 divisors (see below), whose sum is σ = 1997969408. Its totient is φ = 1960368480.

The previous prime is 1979143487. The next prime is 1979143547. The reversal of 1979143489 is 9843419791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1979143489 - 2¹ = 1979143487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979143487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67789 + ... + 92485.

It is an arithmetic number, because the mean of its divisors is an integer number (249746176).

Almost surely, 2^1979143489 is an apocalyptic number.

It is an amenable number.

1979143489 is a deficient number, since it is larger than the sum of its proper divisors (18825919).

1979143489 is a wasteful number, since it uses less digits than its factorization.

1979143489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25455.

The product of its digits is 1959552, while the sum is 55.

The square root of 1979143489 is about 44487.5655548829. The cubic root of 1979143489 is about 1255.5261443675.

The spelling of 1979143489 in words is "one billion, nine hundred seventy-nine million, one hundred forty-three thousand, four hundred eighty-nine".