427221089 has 2 divisors, whose sum is σ = 427221090. Its totient is φ = 427221088.

The previous prime is 427221083. The next prime is 427221097. The reversal of 427221089 is 980122724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363093025 + 64128064 = 19055^2 + 8008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427221089 is a prime.

It is not a weakly prime, because it can be changed into another prime (427221083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610544 + 213610545.

It is an arithmetic number, because the mean of its divisors is an integer number (213610545).

Almost surely, 2^427221089 is an apocalyptic number.

It is an amenable number.

427221089 is a deficient number, since it is larger than the sum of its proper divisors (1).

427221089 is an equidigital number, since it uses as much as digits as its factorization.

427221089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 427221089 is about 20669.3272507839. The cubic root of 427221089 is about 753.1547640860.

The spelling of 427221089 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, eighty-nine".