1834991 has 2 divisors, whose sum is σ = 1834992. Its totient is φ = 1834990.

The previous prime is 1834981. The next prime is 1834993. The reversal of 1834991 is 1994381.

It is a strong prime.

It is an emirp because it is prime and its reverse (1994381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1834991 is a prime.

Together with 1834993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1834993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917495 + 917496.

It is an arithmetic number, because the mean of its divisors is an integer number (917496).

2^1834991 is an apocalyptic number.

1834991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1834991 is an equidigital number, since it uses as much as digits as its factorization.

1834991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 1834991 is about 1354.6183964497. The cubic root of 1834991 is about 122.4272176290.

The spelling of 1834991 in words is "one million, eight hundred thirty-four thousand, nine hundred ninety-one".