1191880411 has 2 divisors, whose sum is σ = 1191880412. Its totient is φ = 1191880410.

The previous prime is 1191880331. The next prime is 1191880423. The reversal of 1191880411 is 1140881911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1191880411 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191880471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595940205 + 595940206.

It is an arithmetic number, because the mean of its divisors is an integer number (595940206).

Almost surely, 2^1191880411 is an apocalyptic number.

1191880411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191880411 is an equidigital number, since it uses as much as digits as its factorization.

1191880411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 34.

The square root of 1191880411 is about 34523.6210586317. The cubic root of 1191880411 is about 1060.2563788897.

It can be divided in two parts, 11918 and 80411, that added together give a palindrome (92329).

The spelling of 1191880411 in words is "one billion, one hundred ninety-one million, eight hundred eighty thousand, four hundred eleven".