11883781997 has 2 divisors, whose sum is σ = 11883781998. Its totient is φ = 11883781996.

The previous prime is 11883781969. The next prime is 11883782021. The reversal of 11883781997 is 79918738811.

It is a happy number.

11883781997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6969912196 + 4913869801 = 83486^2 + 70099^2 .

It is a cyclic number.

It is not a de Polignac number, because 11883781997 - 2¹⁴ = 11883765613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11883781297) 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, 5941890998 + 5941890999.

It is an arithmetic number, because the mean of its divisors is an integer number (5941890999).

Almost surely, 2^11883781997 is an apocalyptic number.

It is an amenable number.

11883781997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11883781997 is an equidigital number, since it uses as much as digits as its factorization.

11883781997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 62.

The spelling of 11883781997 in words is "eleven billion, eight hundred eighty-three million, seven hundred eighty-one thousand, nine hundred ninety-seven".