1898887 has 2 divisors, whose sum is σ = 1898888. Its totient is φ = 1898886.

The previous prime is 1898881. The next prime is 1898893. The reversal of 1898887 is 7888981.

It is a balanced prime because it is at equal distance from previous prime (1898881) and next prime (1898893).

It is an emirp because it is prime and its reverse (7888981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1898887 - 2⁷ = 1898759 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1898887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1898881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949443 + 949444.

It is an arithmetic number, because the mean of its divisors is an integer number (949444).

2^1898887 is an apocalyptic number.

1898887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898887 is an equidigital number, since it uses as much as digits as its factorization.

1898887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 49.

The square root of 1898887 is about 1378.0010885337. The cubic root of 1898887 is about 123.8320436800.

The spelling of 1898887 in words is "one million, eight hundred ninety-eight thousand, eight hundred eighty-seven".