77116841 has 2 divisors, whose sum is σ = 77116842. Its totient is φ = 77116840.

The previous prime is 77116807. The next prime is 77116849. The reversal of 77116841 is 14861177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75759616 + 1357225 = 8704^2 + 1165^2 .

It is an emirp because it is prime and its reverse (14861177) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77116841 is a prime.

It is not a weakly prime, because it can be changed into another prime (77116849) 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, 38558420 + 38558421.

It is an arithmetic number, because the mean of its divisors is an integer number (38558421).

Almost surely, 2^77116841 is an apocalyptic number.

It is an amenable number.

77116841 is a deficient number, since it is larger than the sum of its proper divisors (1).

77116841 is an equidigital number, since it uses as much as digits as its factorization.

77116841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 35.

The square root of 77116841 is about 8781.6194975642. The cubic root of 77116841 is about 425.6471635205.

The spelling of 77116841 in words is "seventy-seven million, one hundred sixteen thousand, eight hundred forty-one".