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12091089 = 34030363
BaseRepresentation
bin101110000111…
…111011010001
3211202021212010
4232013323101
511043403324
61111053133
7204525663
oct56077321
924667763
1012091089
11690923a
1240711a9
1326745ba
14186a533
1510dc829
hexb87ed1

12091089 has 4 divisors (see below), whose sum is σ = 16121456. Its totient is φ = 8060724.

The previous prime is 12091081. The next prime is 12091103. The reversal of 12091089 is 98019021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12091089 - 23 = 12091081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12091081) 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, 2015179 + ... + 2015184.

It is an arithmetic number, because the mean of its divisors is an integer number (4030364).

Almost surely, 212091089 is an apocalyptic number.

It is an amenable number.

12091089 is a deficient number, since it is larger than the sum of its proper divisors (4030367).

12091089 is an equidigital number, since it uses as much as digits as its factorization.

12091089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030366.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 12091089 is about 3477.2243240838. The cubic root of 12091089 is about 229.5206715732.

The spelling of 12091089 in words is "twelve million, ninety-one thousand, eighty-nine".

Divisors: 1 3 4030363 12091089