11973613 has 4 divisors (see below), whose sum is σ = 11988000. Its totient is φ = 11959228.

The previous prime is 11973589. The next prime is 11973623. The reversal of 11973613 is 31637911.

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 an emirpimes, since its reverse is a distinct semiprime: 31637911 = 193 ⋅163927.

It is a cyclic number.

It is not a de Polignac number, because 11973613 - 2⁵ = 11973581 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 (11973623) 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, 5863 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (2997000).

Almost surely, 2^11973613 is an apocalyptic number.

It is an amenable number.

11973613 is a deficient number, since it is larger than the sum of its proper divisors (14387).

11973613 is an equidigital number, since it uses as much as digits as its factorization.

11973613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14386.

The product of its digits is 3402, while the sum is 31.

The square root of 11973613 is about 3460.2908837264. The cubic root of 11973613 is about 228.7749166126.

The spelling of 11973613 in words is "eleven million, nine hundred seventy-three thousand, six hundred thirteen".