1989926030839 has 4 divisors (see below), whose sum is σ = 1989929200824. Its totient is φ = 1989922860856.

The previous prime is 1989926030809. The next prime is 1989926030843. The reversal of 1989926030839 is 9380306299891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1989926030839 - 2¹³ = 1989926022647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989926030809) 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, 291532 + ... + 2016145.

It is an arithmetic number, because the mean of its divisors is an integer number (497482300206).

Almost surely, 2^{1989926030839} is an apocalyptic number.

1989926030839 is a deficient number, since it is larger than the sum of its proper divisors (3169985).

1989926030839 is an equidigital number, since it uses as much as digits as its factorization.

1989926030839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169984.

The product of its (nonzero) digits is 45349632, while the sum is 67.

The spelling of 1989926030839 in words is "one trillion, nine hundred eighty-nine billion, nine hundred twenty-six million, thirty thousand, eight hundred thirty-nine".