11980511 has 2 divisors, whose sum is σ = 11980512. Its totient is φ = 11980510.

The previous prime is 11980483. The next prime is 11980523. The reversal of 11980511 is 11508911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11980511 is a prime.

It is a super-2 number, since 2×11980511² = 287065287642242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11982511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990255 + 5990256.

It is an arithmetic number, because the mean of its divisors is an integer number (5990256).

Almost surely, 2^11980511 is an apocalyptic number.

11980511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11980511 is an equidigital number, since it uses as much as digits as its factorization.

11980511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 26.

The square root of 11980511 is about 3461.2874772258. The cubic root of 11980511 is about 228.8188405985.

The spelling of 11980511 in words is "eleven million, nine hundred eighty thousand, five hundred eleven".