12907987 has 4 divisors (see below), whose sum is σ = 13353120. Its totient is φ = 12462856.

The previous prime is 12907969. The next prime is 12908039. The reversal of 12907987 is 78970921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78970921 = 1303 ⋅60607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12907987 is a prime.

It is a super-2 number, since 2×12907987² = 333232256784338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12907927) 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, 222523 + ... + 222580.

It is an arithmetic number, because the mean of its divisors is an integer number (3338280).

Almost surely, 2^12907987 is an apocalyptic number.

12907987 is a deficient number, since it is larger than the sum of its proper divisors (445133).

12907987 is an equidigital number, since it uses as much as digits as its factorization.

12907987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445132.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 12907987 is about 3592.7687095052. The cubic root of 12907987 is about 234.5774025684.

The spelling of 12907987 in words is "twelve million, nine hundred seven thousand, nine hundred eighty-seven".