Search a number
1813089 = 31993037
BaseRepresentation
bin110111010101001100001
310102010002110
412322221201
5431004324
6102505533
721260655
oct6725141
93363073
101813089
111029223
127352a9
134b6345
14352a65
1525c329
hex1baa61

1813089 has 8 divisors (see below), whose sum is σ = 2430400. Its totient is φ = 1202256.

The previous prime is 1813081. The next prime is 1813121. The reversal of 1813089 is 9803181.

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

It is not a de Polignac number, because 1813089 - 23 = 1813081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (303800).

21813089 is an apocalyptic number.

It is an amenable number.

1813089 is a deficient number, since it is larger than the sum of its proper divisors (617311).

1813089 is a wasteful number, since it uses less digits than its factorization.

1813089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1813089 is about 1346.5099331234. The cubic root of 1813089 is about 121.9381797339.

The spelling of 1813089 in words is "one million, eight hundred thirteen thousand, eighty-nine".

Divisors: 1 3 199 597 3037 9111 604363 1813089