12011977 has 2 divisors, whose sum is σ = 12011978. Its totient is φ = 12011976.

The previous prime is 12011969. The next prime is 12011983. The reversal of 12011977 is 77911021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7639696 + 4372281 = 2764^2 + 2091^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011977 - 2³ = 12011969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005988 + 6005989.

It is an arithmetic number, because the mean of its divisors is an integer number (6005989).

Almost surely, 2^12011977 is an apocalyptic number.

It is an amenable number.

12011977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011977 is an equidigital number, since it uses as much as digits as its factorization.

12011977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 12011977 is about 3465.8299150420. The cubic root of 12011977 is about 229.0189911978.

Adding to 12011977 its reverse (77911021), we get a palindrome (89922998).

The spelling of 12011977 in words is "twelve million, eleven thousand, nine hundred seventy-seven".