77791411 has 2 divisors, whose sum is σ = 77791412. Its totient is φ = 77791410.

The previous prime is 77791387. The next prime is 77791421. The reversal of 77791411 is 11419777.

It is a strong prime.

It is an emirp because it is prime and its reverse (11419777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77791411 - 2⁷ = 77791283 is a prime.

It is not a weakly prime, because it can be changed into another prime (77791421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38895705 + 38895706.

It is an arithmetic number, because the mean of its divisors is an integer number (38895706).

Almost surely, 2^77791411 is an apocalyptic number.

77791411 is a deficient number, since it is larger than the sum of its proper divisors (1).

77791411 is an equidigital number, since it uses as much as digits as its factorization.

77791411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12348, while the sum is 37.

The square root of 77791411 is about 8819.9439340622. The cubic root of 77791411 is about 426.8846608059.

The spelling of 77791411 in words is "seventy-seven million, seven hundred ninety-one thousand, four hundred eleven".