77870027 has 2 divisors, whose sum is σ = 77870028. Its totient is φ = 77870026.

The previous prime is 77869991. The next prime is 77870041. The reversal of 77870027 is 72007877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77870027 - 2¹⁸ = 77607883 is a prime.

It is a super-2 number, since 2×77870027² = 12127482209961458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77870057) 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, 38935013 + 38935014.

It is an arithmetic number, because the mean of its divisors is an integer number (38935014).

Almost surely, 2^77870027 is an apocalyptic number.

77870027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77870027 is an equidigital number, since it uses as much as digits as its factorization.

77870027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38416, while the sum is 38.

The square root of 77870027 is about 8824.3995263134. The cubic root of 77870027 is about 427.0284156034.

The spelling of 77870027 in words is "seventy-seven million, eight hundred seventy thousand, twenty-seven".