11811977 has 16 divisors (see below), whose sum is σ = 13003200. Its totient is φ = 10690560.

The previous prime is 11811973. The next prime is 11811983. The reversal of 11811977 is 77911811.

It is a cyclic number.

It is not a de Polignac number, because 11811977 - 2² = 11811973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11811973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45833 + ... + 46089.

It is an arithmetic number, because the mean of its divisors is an integer number (812700).

Almost surely, 2^11811977 is an apocalyptic number.

It is an amenable number.

11811977 is a deficient number, since it is larger than the sum of its proper divisors (1191223).

11811977 is a wasteful number, since it uses less digits than its factorization.

11811977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its digits is 3528, while the sum is 35.

The square root of 11811977 is about 3436.8556850703. The cubic root of 11811977 is about 227.7408117066.

The spelling of 11811977 in words is "eleven million, eight hundred eleven thousand, nine hundred seventy-seven".