1840493 has 2 divisors, whose sum is σ = 1840494. Its totient is φ = 1840492.

The previous prime is 1840469. The next prime is 1840519. The reversal of 1840493 is 3940481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1630729 + 209764 = 1277^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 1840493 - 2⁶ = 1840429 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1840453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920246 + 920247.

It is an arithmetic number, because the mean of its divisors is an integer number (920247).

2^1840493 is an apocalyptic number.

It is an amenable number.

1840493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840493 is an equidigital number, since it uses as much as digits as its factorization.

1840493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1840493 is about 1356.6477066652. The cubic root of 1840493 is about 122.5494566373.

The spelling of 1840493 in words is "one million, eight hundred forty thousand, four hundred ninety-three".