12953603 has 4 divisors (see below), whose sum is σ = 13950048. Its totient is φ = 11957160.

The previous prime is 12953593. The next prime is 12953651. The reversal of 12953603 is 30635921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30635921 = 17 ⋅1802113.

It is a cyclic number.

It is not a de Polignac number, because 12953603 - 2¹⁶ = 12888067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12953653) 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, 498203 + ... + 498228.

It is an arithmetic number, because the mean of its divisors is an integer number (3487512).

Almost surely, 2^12953603 is an apocalyptic number.

12953603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12953603 is a deficient number, since it is larger than the sum of its proper divisors (996445).

12953603 is an equidigital number, since it uses as much as digits as its factorization.

12953603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996444.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 12953603 is about 3599.1114181142. Note that the first 3 decimals coincide. The cubic root of 12953603 is about 234.8534048747.

The spelling of 12953603 in words is "twelve million, nine hundred fifty-three thousand, six hundred three".