1989239101 has 8 divisors (see below), whose sum is σ = 1995747264. Its totient is φ = 1982742720.

The previous prime is 1989239099. The next prime is 1989239113. The reversal of 1989239101 is 1019329891.

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 1989239101 - 2¹ = 1989239099 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 (1989239401) 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, 433861 + ... + 438421.

It is an arithmetic number, because the mean of its divisors is an integer number (249468408).

Almost surely, 2^1989239101 is an apocalyptic number.

It is an amenable number.

1989239101 is a deficient number, since it is larger than the sum of its proper divisors (6508163).

1989239101 is an equidigital number, since it uses as much as digits as its factorization.

1989239101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 1989239101 is about 44600.8867736954. The cubic root of 1989239101 is about 1257.6573379038.

The spelling of 1989239101 in words is "one billion, nine hundred eighty-nine million, two hundred thirty-nine thousand, one hundred one".