428631529 has 2 divisors, whose sum is σ = 428631530. Its totient is φ = 428631528.

The previous prime is 428631521. The next prime is 428631563. The reversal of 428631529 is 925136824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393109929 + 35521600 = 19827^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 428631529 - 2³ = 428631521 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 428631491 and 428631500.

It is not a weakly prime, because it can be changed into another prime (428631521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214315764 + 214315765.

It is an arithmetic number, because the mean of its divisors is an integer number (214315765).

Almost surely, 2^428631529 is an apocalyptic number.

It is an amenable number.

428631529 is a deficient number, since it is larger than the sum of its proper divisors (1).

428631529 is an equidigital number, since it uses as much as digits as its factorization.

428631529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 428631529 is about 20703.4182926395. The cubic root of 428631529 is about 753.9826825874.

The spelling of 428631529 in words is "four hundred twenty-eight million, six hundred thirty-one thousand, five hundred twenty-nine".