77427827 has 2 divisors, whose sum is σ = 77427828. Its totient is φ = 77427826.

The previous prime is 77427811. The next prime is 77427829. The reversal of 77427827 is 72872477.

It is a strong prime.

It is an emirp because it is prime and its reverse (72872477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77427827 - 2⁴ = 77427811 is a prime.

Together with 77427829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77427829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38713913 + 38713914.

It is an arithmetic number, because the mean of its divisors is an integer number (38713914).

Almost surely, 2^77427827 is an apocalyptic number.

77427827 is a deficient number, since it is larger than the sum of its proper divisors (1).

77427827 is an equidigital number, since it uses as much as digits as its factorization.

77427827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307328, while the sum is 44.

The square root of 77427827 is about 8799.3083250901. The cubic root of 77427827 is about 426.2185595555.

The spelling of 77427827 in words is "seventy-seven million, four hundred twenty-seven thousand, eight hundred twenty-seven".