11997313 has 4 divisors (see below), whose sum is σ = 12007168. Its totient is φ = 11987460.

The previous prime is 11997311. The next prime is 11997319. The reversal of 11997313 is 31379911.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31379911 = 2417 ⋅12983.

It is a cyclic number.

It is not a de Polignac number, because 11997313 - 2¹ = 11997311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11997311) 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, 2793 + ... + 5638.

It is an arithmetic number, because the mean of its divisors is an integer number (3001792).

Almost surely, 2^11997313 is an apocalyptic number.

It is an amenable number.

11997313 is a deficient number, since it is larger than the sum of its proper divisors (9855).

11997313 is an equidigital number, since it uses as much as digits as its factorization.

11997313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9854.

The product of its digits is 5103, while the sum is 34.

The square root of 11997313 is about 3463.7137583813. The cubic root of 11997313 is about 228.9257591952.

The spelling of 11997313 in words is "eleven million, nine hundred ninety-seven thousand, three hundred thirteen".