1889999927 has 2 divisors, whose sum is σ = 1889999928. Its totient is φ = 1889999926.

The previous prime is 1889999911. The next prime is 1889999929. The reversal of 1889999927 is 7299999881.

It is a strong prime.

It is an emirp because it is prime and its reverse (7299999881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1889999927 - 2⁴ = 1889999911 is a prime.

It is a super-5 number, since 5×1889999927⁵ (a number of 48 digits) contains 55555 as substring.

Together with 1889999929, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1889999929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944999963 + 944999964.

It is an arithmetic number, because the mean of its divisors is an integer number (944999964).

Almost surely, 2^1889999927 is an apocalyptic number.

1889999927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889999927 is an equidigital number, since it uses as much as digits as its factorization.

1889999927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 71.

The square root of 1889999927 is about 43474.1293989885. The cubic root of 1889999927 is about 1236.3855740244.

The spelling of 1889999927 in words is "one billion, eight hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred twenty-seven".