427685777 has 2 divisors, whose sum is σ = 427685778. Its totient is φ = 427685776.

The previous prime is 427685773. The next prime is 427685833. The reversal of 427685777 is 777586724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421727296 + 5958481 = 20536^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 427685777 - 2² = 427685773 is a prime.

It is not a weakly prime, because it can be changed into another prime (427685771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213842888 + 213842889.

It is an arithmetic number, because the mean of its divisors is an integer number (213842889).

Almost surely, 2^427685777 is an apocalyptic number.

It is an amenable number.

427685777 is a deficient number, since it is larger than the sum of its proper divisors (1).

427685777 is an equidigital number, since it uses as much as digits as its factorization.

427685777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4609920, while the sum is 53.

The square root of 427685777 is about 20680.5652002067. The cubic root of 427685777 is about 753.4277337302.

The spelling of 427685777 in words is "four hundred twenty-seven million, six hundred eighty-five thousand, seven hundred seventy-seven".