1802089 has 4 divisors (see below), whose sum is σ = 1864260. Its totient is φ = 1739920.

The previous prime is 1802083. The next prime is 1802107. The reversal of 1802089 is 9802081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 518400 = 1133^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1802089 - 2³ = 1802081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1802081) 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, 31042 + ... + 31099.

It is an arithmetic number, because the mean of its divisors is an integer number (466065).

2^1802089 is an apocalyptic number.

It is an amenable number.

1802089 is a deficient number, since it is larger than the sum of its proper divisors (62171).

1802089 is an equidigital number, since it uses as much as digits as its factorization.

1802089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62170.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1802089 is about 1342.4190850848. The cubic root of 1802089 is about 121.6910799407.

The spelling of 1802089 in words is "one million, eight hundred two thousand, eighty-nine".