1889100839 has 2 divisors, whose sum is σ = 1889100840. Its totient is φ = 1889100838.

The previous prime is 1889100779. The next prime is 1889100841. The reversal of 1889100839 is 9380019881.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9380019881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1889100839 - 2²⁰ = 1888052263 is a prime.

Together with 1889100841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1889100793 and 1889100802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1889100139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944550419 + 944550420.

It is an arithmetic number, because the mean of its divisors is an integer number (944550420).

Almost surely, 2^1889100839 is an apocalyptic number.

1889100839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889100839 is an equidigital number, since it uses as much as digits as its factorization.

1889100839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 1889100839 is about 43463.7876743387. The cubic root of 1889100839 is about 1236.1894901106.

The spelling of 1889100839 in words is "one billion, eight hundred eighty-nine million, one hundred thousand, eight hundred thirty-nine".