1898389 has 2 divisors, whose sum is σ = 1898390. Its totient is φ = 1898388.

The previous prime is 1898383. The next prime is 1898417. The reversal of 1898389 is 9838981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 195364 = 1305^2 + 442^2 .

It is an emirp because it is prime and its reverse (9838981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1898389 - 2¹¹ = 1896341 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1898383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949194 + 949195.

It is an arithmetic number, because the mean of its divisors is an integer number (949195).

2^1898389 is an apocalyptic number.

It is an amenable number.

1898389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898389 is an equidigital number, since it uses as much as digits as its factorization.

1898389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 1898389 is about 1377.8203801657. The cubic root of 1898389 is about 123.8212173820.

The spelling of 1898389 in words is "one million, eight hundred ninety-eight thousand, three hundred eighty-nine".