1890799 has 2 divisors, whose sum is σ = 1890800. Its totient is φ = 1890798.

The previous prime is 1890793. The next prime is 1890809. The reversal of 1890799 is 9970981.

It is a weak prime.

It is an emirp because it is prime and its reverse (9970981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1890799 - 2¹³ = 1882607 is a prime.

1890799 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945399 + 945400.

It is an arithmetic number, because the mean of its divisors is an integer number (945400).

2^1890799 is an apocalyptic number.

1890799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890799 is an equidigital number, since it uses as much as digits as its factorization.

1890799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1890799 is about 1375.0632712715. The cubic root of 1890799 is about 123.6559793278.

The spelling of 1890799 in words is "one million, eight hundred ninety thousand, seven hundred ninety-nine".