11777791 has 2 divisors, whose sum is σ = 11777792. Its totient is φ = 11777790.

The previous prime is 11777789. The next prime is 11777833. The reversal of 11777791 is 19777711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19777711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11777791 - 2¹ = 11777789 is a prime.

Together with 11777789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11777191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5888895 + 5888896.

It is an arithmetic number, because the mean of its divisors is an integer number (5888896).

Almost surely, 2^11777791 is an apocalyptic number.

11777791 is a deficient number, since it is larger than the sum of its proper divisors (1).

11777791 is an equidigital number, since it uses as much as digits as its factorization.

11777791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21609, while the sum is 40.

The square root of 11777791 is about 3431.8786400454. The cubic root of 11777791 is about 227.5208916933.

The spelling of 11777791 in words is "eleven million, seven hundred seventy-seven thousand, seven hundred ninety-one".