428948129 has 2 divisors, whose sum is σ = 428948130. Its totient is φ = 428948128.

The previous prime is 428948087. The next prime is 428948189. The reversal of 428948129 is 921849824.

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., 426339904 + 2608225 = 20648^2 + 1615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428948129 is a prime.

It is not a weakly prime, because it can be changed into another prime (428948189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214474064 + 214474065.

It is an arithmetic number, because the mean of its divisors is an integer number (214474065).

Almost surely, 2^428948129 is an apocalyptic number.

It is an amenable number.

428948129 is a deficient number, since it is larger than the sum of its proper divisors (1).

428948129 is an equidigital number, since it uses as much as digits as its factorization.

428948129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 47.

The square root of 428948129 is about 20711.0629616155. The cubic root of 428948129 is about 754.1682749142.

The spelling of 428948129 in words is "four hundred twenty-eight million, nine hundred forty-eight thousand, one hundred twenty-nine".