12887983 has 4 divisors (see below), whose sum is σ = 12900888. Its totient is φ = 12875080.

The previous prime is 12887933. The next prime is 12887993. The reversal of 12887983 is 38978821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38978821 = 7 ⋅5568403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12887983 is a prime.

It is a super-2 number, since 2×12887983² = 332200211616578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887923) 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, 4816 + ... + 6997.

It is an arithmetic number, because the mean of its divisors is an integer number (3225222).

Almost surely, 2^12887983 is an apocalyptic number.

12887983 is a deficient number, since it is larger than the sum of its proper divisors (12905).

12887983 is a wasteful number, since it uses less digits than its factorization.

12887983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12904.

The product of its digits is 193536, while the sum is 46.

The square root of 12887983 is about 3589.9837046984. The cubic root of 12887983 is about 234.4561620658.

The spelling of 12887983 in words is "twelve million, eight hundred eighty-seven thousand, nine hundred eighty-three".