11980291 has 16 divisors (see below), whose sum is σ = 13271040. Its totient is φ = 10765440.

The previous prime is 11980261. The next prime is 11980301. The reversal of 11980291 is 19208911.

11980291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 7-Lehmer number, since φ(11980291) divides (11980291-1)⁷.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11980291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11980231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66840 + ... + 67018.

It is an arithmetic number, because the mean of its divisors is an integer number (829440).

Almost surely, 2^11980291 is an apocalyptic number.

11980291 is a deficient number, since it is larger than the sum of its proper divisors (1290749).

11980291 is a wasteful number, since it uses less digits than its factorization.

11980291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 11980291 is about 3461.2556969978. The cubic root of 11980291 is about 228.8174399779.

The spelling of 11980291 in words is "eleven million, nine hundred eighty thousand, two hundred ninety-one".