77982049 has 2 divisors, whose sum is σ = 77982050. Its totient is φ = 77982048.

The previous prime is 77982017. The next prime is 77982059. The reversal of 77982049 is 94028977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71707024 + 6275025 = 8468^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 77982049 - 2⁵ = 77982017 is a prime.

It is not a weakly prime, because it can be changed into another prime (77982059) 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, 38991024 + 38991025.

It is an arithmetic number, because the mean of its divisors is an integer number (38991025).

Almost surely, 2^77982049 is an apocalyptic number.

It is an amenable number.

77982049 is a deficient number, since it is larger than the sum of its proper divisors (1).

77982049 is an equidigital number, since it uses as much as digits as its factorization.

77982049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 77982049 is about 8830.7445325975. The cubic root of 77982049 is about 427.2330885200.

It can be divided in two parts, 779 and 82049, that added together give a palindrome (82828).

The spelling of 77982049 in words is "seventy-seven million, nine hundred eighty-two thousand, forty-nine".