1842989 has 2 divisors, whose sum is σ = 1842990. Its totient is φ = 1842988.

The previous prime is 1842977. The next prime is 1843003. The reversal of 1842989 is 9892481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1800964 + 42025 = 1342^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1842989 - 2¹⁶ = 1777453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1842949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921494 + 921495.

It is an arithmetic number, because the mean of its divisors is an integer number (921495).

2^1842989 is an apocalyptic number.

It is an amenable number.

1842989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842989 is an equidigital number, since it uses as much as digits as its factorization.

1842989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 1842989 is about 1357.5673095652. The cubic root of 1842989 is about 122.6048304370.

The spelling of 1842989 in words is "one million, eight hundred forty-two thousand, nine hundred eighty-nine".