11973817 has 4 divisors (see below), whose sum is σ = 12047440. Its totient is φ = 11900196.

The previous prime is 11973799. The next prime is 11973821. The reversal of 11973817 is 71837911.

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 11973817 - 2¹¹ = 11971769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11977817) 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, 36567 + ... + 36892.

It is an arithmetic number, because the mean of its divisors is an integer number (3011860).

Almost surely, 2^11973817 is an apocalyptic number.

It is an amenable number.

11973817 is a deficient number, since it is larger than the sum of its proper divisors (73623).

11973817 is an equidigital number, since it uses as much as digits as its factorization.

11973817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73622.

The product of its digits is 10584, while the sum is 37.

The square root of 11973817 is about 3460.3203608915. The cubic root of 11973817 is about 228.7762158534.

The spelling of 11973817 in words is "eleven million, nine hundred seventy-three thousand, eight hundred seventeen".