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12139293 = 337109363
BaseRepresentation
bin101110010011…
…101100011101
3211211201222110
4232103230131
511101424133
61112104233
7205116345
oct56235435
924751873
1012139293
116941481
124095079
13269051a
14187dd25
1510ebc63
hexb93b1d

12139293 has 8 divisors (see below), whose sum is σ = 16623328. Its totient is φ = 7874064.

The previous prime is 12139289. The next prime is 12139307. The reversal of 12139293 is 39293121.

It is a happy number.

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

It is not a de Polignac number, because 12139293 - 22 = 12139289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12139293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131293) 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, 54571 + ... + 54792.

It is an arithmetic number, because the mean of its divisors is an integer number (2077916).

Almost surely, 212139293 is an apocalyptic number.

It is an amenable number.

12139293 is a deficient number, since it is larger than the sum of its proper divisors (4484035).

12139293 is a wasteful number, since it uses less digits than its factorization.

12139293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109403.

The product of its digits is 2916, while the sum is 30.

The square root of 12139293 is about 3484.1488200133. The cubic root of 12139293 is about 229.8252800357.

The spelling of 12139293 in words is "twelve million, one hundred thirty-nine thousand, two hundred ninety-three".

Divisors: 1 3 37 111 109363 328089 4046431 12139293