12992987 has 6 divisors (see below), whose sum is σ = 15114348. Its totient is φ = 11136804.

The previous prime is 12992983. The next prime is 12993007. The reversal of 12992987 is 78929921.

It is a happy number.

12992987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12992987 - 2² = 12992983 is a prime.

It is a super-2 number, since 2×12992987² = 337635422364338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12992983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132533 + ... + 132630.

It is an arithmetic number, because the mean of its divisors is an integer number (2519058).

Almost surely, 2^12992987 is an apocalyptic number.

12992987 is a deficient number, since it is larger than the sum of its proper divisors (2121361).

12992987 is an equidigital number, since it uses as much as digits as its factorization.

12992987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265177 (or 265170 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 12992987 is about 3604.5786161492. The cubic root of 12992987 is about 235.0911793457.

The spelling of 12992987 in words is "twelve million, nine hundred ninety-two thousand, nine hundred eighty-seven".