12691003 has 4 divisors (see below), whose sum is σ = 13667248. Its totient is φ = 11714760.

The previous prime is 12691001. The next prime is 12691033. The reversal of 12691003 is 30019621.

12691003 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 12691003 - 2¹ = 12691001 is a prime.

It is a super-2 number, since 2×12691003² = 322123114292018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12691001) 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, 488103 + ... + 488128.

It is an arithmetic number, because the mean of its divisors is an integer number (3416812).

Almost surely, 2^12691003 is an apocalyptic number.

12691003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12691003 is a deficient number, since it is larger than the sum of its proper divisors (976245).

12691003 is an equidigital number, since it uses as much as digits as its factorization.

12691003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976244.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 12691003 is about 3562.4434030592. The cubic root of 12691003 is about 233.2555479948.

The spelling of 12691003 in words is "twelve million, six hundred ninety-one thousand, three".