11980771 has 4 divisors (see below), whose sum is σ = 13069944. Its totient is φ = 10891600.

The previous prime is 11980763. The next prime is 11980777. The reversal of 11980771 is 17708911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17708911 = 11 ⋅1609901.

It is a cyclic number.

It is not a de Polignac number, because 11980771 - 2³ = 11980763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11980777) 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, 544570 + ... + 544591.

It is an arithmetic number, because the mean of its divisors is an integer number (3267486).

Almost surely, 2^11980771 is an apocalyptic number.

11980771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11980771 is a deficient number, since it is larger than the sum of its proper divisors (1089173).

11980771 is a wasteful number, since it uses less digits than its factorization.

11980771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089172.

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 11980771 is about 3461.3250353008. The cubic root of 11980771 is about 228.8204958553.

The spelling of 11980771 in words is "eleven million, nine hundred eighty thousand, seven hundred seventy-one".