428869277 has 2 divisors, whose sum is σ = 428869278. Its totient is φ = 428869276.

The previous prime is 428869261. The next prime is 428869303. The reversal of 428869277 is 772968824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394459321 + 34409956 = 19861^2 + 5866^2 .

It is a cyclic number.

It is not a de Polignac number, because 428869277 - 2⁴ = 428869261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421869277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214434638 + 214434639.

It is an arithmetic number, because the mean of its divisors is an integer number (214434639).

Almost surely, 2^428869277 is an apocalyptic number.

It is an amenable number.

428869277 is a deficient number, since it is larger than the sum of its proper divisors (1).

428869277 is an equidigital number, since it uses as much as digits as its factorization.

428869277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 53.

The square root of 428869277 is about 20709.1592538181. The cubic root of 428869277 is about 754.1220600636.

The spelling of 428869277 in words is "four hundred twenty-eight million, eight hundred sixty-nine thousand, two hundred seventy-seven".