1801339 has 2 divisors, whose sum is σ = 1801340. Its totient is φ = 1801338.

The previous prime is 1801309. The next prime is 1801357. The reversal of 1801339 is 9331081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1801339 - 2¹³ = 1793147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1801309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900669 + 900670.

It is an arithmetic number, because the mean of its divisors is an integer number (900670).

2^1801339 is an apocalyptic number.

1801339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801339 is an equidigital number, since it uses as much as digits as its factorization.

1801339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1801339 is about 1342.1397095683. The cubic root of 1801339 is about 121.6741956518.

The spelling of 1801339 in words is "one million, eight hundred one thousand, three hundred thirty-nine".