427221349 has 2 divisors, whose sum is σ = 427221350. Its totient is φ = 427221348.

The previous prime is 427221341. The next prime is 427221367. The reversal of 427221349 is 943122724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330985249 + 96236100 = 18193^2 + 9810^2 .

It is a cyclic number.

It is not a de Polignac number, because 427221349 - 2³ = 427221341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427221341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610674 + 213610675.

It is an arithmetic number, because the mean of its divisors is an integer number (213610675).

Almost surely, 2^427221349 is an apocalyptic number.

It is an amenable number.

427221349 is a deficient number, since it is larger than the sum of its proper divisors (1).

427221349 is an equidigital number, since it uses as much as digits as its factorization.

427221349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 427221349 is about 20669.3335402959. Note that the first 3 decimals coincide. The cubic root of 427221349 is about 753.1549168720.

The spelling of 427221349 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, three hundred forty-nine".