428032897 has 2 divisors, whose sum is σ = 428032898. Its totient is φ = 428032896.

The previous prime is 428032873. The next prime is 428032933. The reversal of 428032897 is 798230824.

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., 424195216 + 3837681 = 20596^2 + 1959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428032897 is a prime.

It is not a weakly prime, because it can be changed into another prime (428032867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214016448 + 214016449.

It is an arithmetic number, because the mean of its divisors is an integer number (214016449).

Almost surely, 2^428032897 is an apocalyptic number.

It is an amenable number.

428032897 is a deficient number, since it is larger than the sum of its proper divisors (1).

428032897 is an equidigital number, since it uses as much as digits as its factorization.

428032897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 428032897 is about 20688.9559185571. The cubic root of 428032897 is about 753.6315119292.

The spelling of 428032897 in words is "four hundred twenty-eight million, thirty-two thousand, eight hundred ninety-seven".