1813189 has 8 divisors (see below), whose sum is σ = 2181440. Its totient is φ = 1472256.

The previous prime is 1813177. The next prime is 1813211. The reversal of 1813189 is 9813181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1813189 - 2⁵ = 1813157 is a prime.

It is a Duffinian number.

1813189 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1813189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6684 + ... + 6949.

It is an arithmetic number, because the mean of its divisors is an integer number (272680).

2^1813189 is an apocalyptic number.

1813189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1813189 is a deficient number, since it is larger than the sum of its proper divisors (368251).

1813189 is a wasteful number, since it uses less digits than its factorization.

1813189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659.

The product of its digits is 1728, while the sum is 31.

The square root of 1813189 is about 1346.5470656461. The cubic root of 1813189 is about 121.9404215054.

It can be divided in two parts, 1813 and 189, that added together give a palindrome (2002).

The spelling of 1813189 in words is "one million, eight hundred thirteen thousand, one hundred eighty-nine".