1798091 has 4 divisors (see below), whose sum is σ = 1802784. Its totient is φ = 1793400.

The previous prime is 1798081. The next prime is 1798109. The reversal of 1798091 is 1908971.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1798091 - 2¹⁰ = 1797067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1798001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1715 + ... + 2556.

It is an arithmetic number, because the mean of its divisors is an integer number (450696).

2^1798091 is an apocalyptic number.

1798091 is a deficient number, since it is larger than the sum of its proper divisors (4693).

1798091 is an equidigital number, since it uses as much as digits as its factorization.

1798091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1798091 is about 1340.9291554739. The cubic root of 1798091 is about 121.6010212792.

The spelling of 1798091 in words is "one million, seven hundred ninety-eight thousand, ninety-one".