12139863 has 8 divisors (see below), whose sum is σ = 16228848. Its totient is φ = 8072064.

The previous prime is 12139861. The next prime is 12139871. The reversal of 12139863 is 36893121.

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

It is not a de Polignac number, because 12139863 - 2¹ = 12139861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139861) 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, 3906 + ... + 6287.

It is an arithmetic number, because the mean of its divisors is an integer number (2028606).

Almost surely, 2^12139863 is an apocalyptic number.

12139863 is a deficient number, since it is larger than the sum of its proper divisors (4088985).

12139863 is a wasteful number, since it uses less digits than its factorization.

12139863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10593.

The product of its digits is 7776, while the sum is 33.

The square root of 12139863 is about 3484.2306180849. The cubic root of 12139863 is about 229.8288771249.

The spelling of 12139863 in words is "twelve million, one hundred thirty-nine thousand, eight hundred sixty-three".