12987903 has 4 divisors (see below), whose sum is σ = 17317208. Its totient is φ = 8658600.

The previous prime is 12987899. The next prime is 12987907. The reversal of 12987903 is 30978921.

12987903 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30978921 = 3 ⋅10326307.

It is an interprime number because it is at equal distance from previous prime (12987899) and next prime (12987907).

It is not a de Polignac number, because 12987903 - 2² = 12987899 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 (12987907) 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, 2164648 + ... + 2164653.

It is an arithmetic number, because the mean of its divisors is an integer number (4329302).

Almost surely, 2^12987903 is an apocalyptic number.

12987903 is a deficient number, since it is larger than the sum of its proper divisors (4329305).

12987903 is an equidigital number, since it uses as much as digits as its factorization.

12987903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329304.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 12987903 is about 3603.8733329572. The cubic root of 12987903 is about 235.0605125591.

The spelling of 12987903 in words is "twelve million, nine hundred eighty-seven thousand, nine hundred three".