11980817 has 4 divisors (see below), whose sum is σ = 12235776. Its totient is φ = 11725860.

The previous prime is 11980807. The next prime is 11980819. The reversal of 11980817 is 71808911.

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: 71808911 = 149 ⋅481939.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11980817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11980819) 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, 127409 + ... + 127502.

It is an arithmetic number, because the mean of its divisors is an integer number (3058944).

Almost surely, 2^11980817 is an apocalyptic number.

It is an amenable number.

11980817 is a deficient number, since it is larger than the sum of its proper divisors (254959).

11980817 is an equidigital number, since it uses as much as digits as its factorization.

11980817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254958.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 11980817 is about 3461.3316801486. The cubic root of 11980817 is about 228.8207887060.

The spelling of 11980817 in words is "eleven million, nine hundred eighty thousand, eight hundred seventeen".