77791027 has 2 divisors, whose sum is σ = 77791028. Its totient is φ = 77791026.

The previous prime is 77790971. The next prime is 77791067. The reversal of 77791027 is 72019777.

It is an a-pointer prime, because the next prime (77791067) can be obtained adding 77791027 to its sum of digits (40).

It is a strong prime.

It is an emirp because it is prime and its reverse (72019777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77791027 - 2¹⁵ = 77758259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77791067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38895513 + 38895514.

It is an arithmetic number, because the mean of its divisors is an integer number (38895514).

Almost surely, 2^77791027 is an apocalyptic number.

77791027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77791027 is an equidigital number, since it uses as much as digits as its factorization.

77791027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43218, while the sum is 40.

The square root of 77791027 is about 8819.9221651894. The cubic root of 77791027 is about 426.8839583977.

The spelling of 77791027 in words is "seventy-seven million, seven hundred ninety-one thousand, twenty-seven".