77718133 has 2 divisors, whose sum is σ = 77718134. Its totient is φ = 77718132.

The previous prime is 77718107. The next prime is 77718139. The reversal of 77718133 is 33181777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50438404 + 27279729 = 7102^2 + 5223^2 .

It is a cyclic number.

It is not a de Polignac number, because 77718133 - 2¹⁷ = 77587061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77718092 and 77718101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77718139) 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, 38859066 + 38859067.

It is an arithmetic number, because the mean of its divisors is an integer number (38859067).

Almost surely, 2^77718133 is an apocalyptic number.

It is an amenable number.

77718133 is a deficient number, since it is larger than the sum of its proper divisors (1).

77718133 is an equidigital number, since it uses as much as digits as its factorization.

77718133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 37.

The square root of 77718133 is about 8815.7888472898. The cubic root of 77718133 is about 426.7505796735.

The spelling of 77718133 in words is "seventy-seven million, seven hundred eighteen thousand, one hundred thirty-three".