2027187989 has 2 divisors, whose sum is σ = 2027187990. Its totient is φ = 2027187988.

The previous prime is 2027187983. The next prime is 2027187997. The reversal of 2027187989 is 9897817202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1249056964 + 778131025 = 35342^2 + 27895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2027187989 - 2⁸ = 2027187733 is a prime.

It is a super-2 number, since 2×2027187989² = 8218982285491728242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2027187989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2027187983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013593994 + 1013593995.

It is an arithmetic number, because the mean of its divisors is an integer number (1013593995).

Almost surely, 2^2027187989 is an apocalyptic number.

It is an amenable number.

2027187989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2027187989 is an equidigital number, since it uses as much as digits as its factorization.

2027187989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 2027187989 is about 45024.3044254989. The cubic root of 2027187989 is about 1265.6044935429.

The spelling of 2027187989 in words is "two billion, twenty-seven million, one hundred eighty-seven thousand, nine hundred eighty-nine".