4187868889 has 2 divisors, whose sum is σ = 4187868890. Its totient is φ = 4187868888.

The previous prime is 4187868787. The next prime is 4187868901. The reversal of 4187868889 is 9888687814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4158057289 + 29811600 = 64483^2 + 5460^2 .

It is a cyclic number.

It is not a de Polignac number, because 4187868889 - 2⁷ = 4187868761 is a prime.

It is not a weakly prime, because it can be changed into another prime (4187868989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2093934444 + 2093934445.

It is an arithmetic number, because the mean of its divisors is an integer number (2093934445).

Almost surely, 2^4187868889 is an apocalyptic number.

It is an amenable number.

4187868889 is a deficient number, since it is larger than the sum of its proper divisors (1).

4187868889 is an equidigital number, since it uses as much as digits as its factorization.

4187868889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49545216, while the sum is 67.

The square root of 4187868889 is about 64713.7457500337. The cubic root of 4187868889 is about 1611.8737605795.

The spelling of 4187868889 in words is "four billion, one hundred eighty-seven million, eight hundred sixty-eight thousand, eight hundred eighty-nine".