1081939 has 2 divisors, whose sum is σ = 1081940. Its totient is φ = 1081938.

The previous prime is 1081937. The next prime is 1081979. The reversal of 1081939 is 9391801.

It is a weak prime.

It is an emirp because it is prime and its reverse (9391801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1081939 - 2¹ = 1081937 is a prime.

Together with 1081937, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1081939.

It is not a weakly prime, because it can be changed into another prime (1081937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540969 + 540970.

It is an arithmetic number, because the mean of its divisors is an integer number (540970).

2^1081939 is an apocalyptic number.

1081939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081939 is an equidigital number, since it uses as much as digits as its factorization.

1081939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1081939 is about 1040.1629680007. The cubic root of 1081939 is about 102.6599208945.

The spelling of 1081939 in words is "one million, eighty-one thousand, nine hundred thirty-nine".