77331841 has 2 divisors, whose sum is σ = 77331842. Its totient is φ = 77331840.

The previous prime is 77331817. The next prime is 77331853. The reversal of 77331841 is 14813377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 12931216 = 8025^2 + 3596^2 .

It is an emirp because it is prime and its reverse (14813377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77331841 - 2⁵ = 77331809 is a prime.

It is equal to p_4522795 and since 77331841 and 4522795 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 77331797 and 77331806.

It is not a weakly prime, because it can be changed into another prime (77331811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38665920 + 38665921.

It is an arithmetic number, because the mean of its divisors is an integer number (38665921).

Almost surely, 2^77331841 is an apocalyptic number.

It is an amenable number.

77331841 is a deficient number, since it is larger than the sum of its proper divisors (1).

77331841 is an equidigital number, since it uses as much as digits as its factorization.

77331841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 77331841 is about 8793.8524549824. The cubic root of 77331841 is about 426.0423613528.

The spelling of 77331841 in words is "seventy-seven million, three hundred thirty-one thousand, eight hundred forty-one".