12939887 has 8 divisors (see below), whose sum is σ = 13713840. Its totient is φ = 12187840.

The previous prime is 12939859. The next prime is 12939889. The reversal of 12939887 is 78893921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12939887 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 (12939889) 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, 4253 + ... + 6630.

It is an arithmetic number, because the mean of its divisors is an integer number (1714230).

Almost surely, 2^12939887 is an apocalyptic number.

12939887 is a deficient number, since it is larger than the sum of its proper divisors (773953).

12939887 is a wasteful number, since it uses less digits than its factorization.

12939887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10953.

The product of its digits is 217728, while the sum is 47.

The square root of 12939887 is about 3597.2054431183. The cubic root of 12939887 is about 234.7704836231.

The spelling of 12939887 in words is "twelve million, nine hundred thirty-nine thousand, eight hundred eighty-seven".