77836481 has 2 divisors, whose sum is σ = 77836482. Its totient is φ = 77836480.

The previous prime is 77836477. The next prime is 77836541. The reversal of 77836481 is 18463877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70224400 + 7612081 = 8380^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 77836481 - 2² = 77836477 is a prime.

It is a super-2 number, since 2×77836481² = 12117035548926722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77836411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38918240 + 38918241.

It is an arithmetic number, because the mean of its divisors is an integer number (38918241).

Almost surely, 2^77836481 is an apocalyptic number.

It is an amenable number.

77836481 is a deficient number, since it is larger than the sum of its proper divisors (1).

77836481 is an equidigital number, since it uses as much as digits as its factorization.

77836481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 77836481 is about 8822.4985689996. The cubic root of 77836481 is about 426.9670862604.

The spelling of 77836481 in words is "seventy-seven million, eight hundred thirty-six thousand, four hundred eighty-one".