12603813 has 4 divisors (see below), whose sum is σ = 16805088. Its totient is φ = 8402540.

The previous prime is 12603809. The next prime is 12603823. The reversal of 12603813 is 31830621.

12603813 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12603813 - 2² = 12603809 is a prime.

It is a super-2 number, since 2×12603813² = 317712204277938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12603823) 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, 2100633 + ... + 2100638.

It is an arithmetic number, because the mean of its divisors is an integer number (4201272).

Almost surely, 2^12603813 is an apocalyptic number.

It is an amenable number.

12603813 is a deficient number, since it is larger than the sum of its proper divisors (4201275).

12603813 is an equidigital number, since it uses as much as digits as its factorization.

12603813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201274.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12603813 is about 3550.1849247610. The cubic root of 12603813 is about 232.7201475933.

The spelling of 12603813 in words is "twelve million, six hundred three thousand, eight hundred thirteen".