77380087 has 2 divisors, whose sum is σ = 77380088. Its totient is φ = 77380086.

The previous prime is 77380063. The next prime is 77380097. The reversal of 77380087 is 78008377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77380087 - 2¹⁹ = 76855799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77380007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38690043 + 38690044.

It is an arithmetic number, because the mean of its divisors is an integer number (38690044).

Almost surely, 2^77380087 is an apocalyptic number.

77380087 is a deficient number, since it is larger than the sum of its proper divisors (1).

77380087 is an equidigital number, since it uses as much as digits as its factorization.

77380087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 77380087 is about 8796.5951935962. The cubic root of 77380087 is about 426.1309430908.

The spelling of 77380087 in words is "seventy-seven million, three hundred eighty thousand, eighty-seven".