1989739305539 has 8 divisors (see below), whose sum is σ = 2058368591520. Its totient is φ = 1921111192000.

The previous prime is 1989739305493. The next prime is 1989739305553. The reversal of 1989739305539 is 9355039379891.

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 1989739305539 - 2³⁶ = 1921019828803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989739305569) 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, 4473839 + ... + 4898439.

It is an arithmetic number, because the mean of its divisors is an integer number (257296073940).

Almost surely, 2^{1989739305539} is an apocalyptic number.

1989739305539 is a deficient number, since it is larger than the sum of its proper divisors (68629285981).

1989739305539 is a wasteful number, since it uses less digits than its factorization.

1989739305539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586221.

The product of its (nonzero) digits is 248005800, while the sum is 71.

The spelling of 1989739305539 in words is "one trillion, nine hundred eighty-nine billion, seven hundred thirty-nine million, three hundred five thousand, five hundred thirty-nine".