428961397 has 2 divisors, whose sum is σ = 428961398. Its totient is φ = 428961396.

The previous prime is 428961349. The next prime is 428961413. The reversal of 428961397 is 793169824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428945521 + 15876 = 20711^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 428961397 - 2¹⁹ = 428437109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428961397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428961317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214480698 + 214480699.

It is an arithmetic number, because the mean of its divisors is an integer number (214480699).

Almost surely, 2^428961397 is an apocalyptic number.

It is an amenable number.

428961397 is a deficient number, since it is larger than the sum of its proper divisors (1).

428961397 is an equidigital number, since it uses as much as digits as its factorization.

428961397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 428961397 is about 20711.3832710420. The cubic root of 428961397 is about 754.1760506808.

The spelling of 428961397 in words is "four hundred twenty-eight million, nine hundred sixty-one thousand, three hundred ninety-seven".