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12189399 = 34063133
BaseRepresentation
bin101110011111…
…111011010111
3211221021201020
4232133323113
511110030044
61113132223
7205415415
oct56377327
924837636
1012189399
116976092
1240ba073
1326aa281
1418942b5
15110ba19
hexb9fed7

12189399 has 4 divisors (see below), whose sum is σ = 16252536. Its totient is φ = 8126264.

The previous prime is 12189371. The next prime is 12189439. The reversal of 12189399 is 99398121.

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 12189399 - 213 = 12181207 is a prime.

It is a super-3 number, since 3×121893993 (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12189399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189349) 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, 2031564 + ... + 2031569.

It is an arithmetic number, because the mean of its divisors is an integer number (4063134).

Almost surely, 212189399 is an apocalyptic number.

12189399 is a deficient number, since it is larger than the sum of its proper divisors (4063137).

12189399 is an equidigital number, since it uses as much as digits as its factorization.

12189399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063136.

The product of its digits is 34992, while the sum is 42.

The square root of 12189399 is about 3491.3319807775. The cubic root of 12189399 is about 230.1410539937.

The spelling of 12189399 in words is "twelve million, one hundred eighty-nine thousand, three hundred ninety-nine".

Divisors: 1 3 4063133 12189399