427221653 has 2 divisors, whose sum is σ = 427221654. Its totient is φ = 427221652.

The previous prime is 427221601. The next prime is 427221661. The reversal of 427221653 is 356122724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306705169 + 120516484 = 17513^2 + 10978^2 .

It is a cyclic number.

It is not a de Polignac number, because 427221653 - 2⁶ = 427221589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427221673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610826 + 213610827.

It is an arithmetic number, because the mean of its divisors is an integer number (213610827).

Almost surely, 2^427221653 is an apocalyptic number.

It is an amenable number.

427221653 is a deficient number, since it is larger than the sum of its proper divisors (1).

427221653 is an equidigital number, since it uses as much as digits as its factorization.

427221653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 427221653 is about 20669.3408941843. The cubic root of 427221653 is about 753.1550955140.

The spelling of 427221653 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred fifty-three".