427337221 has 2 divisors, whose sum is σ = 427337222. Its totient is φ = 427337220.

The previous prime is 427337191. The next prime is 427337233. The reversal of 427337221 is 122733724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425968321 + 1368900 = 20639^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 427337221 - 2¹⁷ = 427206149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427337021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213668610 + 213668611.

It is an arithmetic number, because the mean of its divisors is an integer number (213668611).

Almost surely, 2^427337221 is an apocalyptic number.

It is an amenable number.

427337221 is a deficient number, since it is larger than the sum of its proper divisors (1).

427337221 is an equidigital number, since it uses as much as digits as its factorization.

427337221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 31.

The square root of 427337221 is about 20672.1363433971. The cubic root of 427337221 is about 753.2230015453.

The spelling of 427337221 in words is "four hundred twenty-seven million, three hundred thirty-seven thousand, two hundred twenty-one".