427297213549 has 2 divisors, whose sum is σ = 427297213550. Its totient is φ = 427297213548.

The previous prime is 427297213487. The next prime is 427297213579. The reversal of 427297213549 is 945312792724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352814616324 + 74482597225 = 593982^2 + 272915^2 .

It is a cyclic number.

It is not a de Polignac number, because 427297213549 - 2⁹ = 427297213037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427297213549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427297213579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213648606774 + 213648606775.

It is an arithmetic number, because the mean of its divisors is an integer number (213648606775).

Almost surely, 2^427297213549 is an apocalyptic number.

It is an amenable number.

427297213549 is a deficient number, since it is larger than the sum of its proper divisors (1).

427297213549 is an equidigital number, since it uses as much as digits as its factorization.

427297213549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 55.

The spelling of 427297213549 in words is "four hundred twenty-seven billion, two hundred ninety-seven million, two hundred thirteen thousand, five hundred forty-nine".