428933317 has 2 divisors, whose sum is σ = 428933318. Its totient is φ = 428933316.

The previous prime is 428933269. The next prime is 428933347. The reversal of 428933317 is 713339824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386083201 + 42850116 = 19649^2 + 6546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428933317 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428933317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428933347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214466658 + 214466659.

It is an arithmetic number, because the mean of its divisors is an integer number (214466659).

Almost surely, 2^428933317 is an apocalyptic number.

It is an amenable number.

428933317 is a deficient number, since it is larger than the sum of its proper divisors (1).

428933317 is an equidigital number, since it uses as much as digits as its factorization.

428933317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 428933317 is about 20710.7053718602. The cubic root of 428933317 is about 754.1595940907.

The spelling of 428933317 in words is "four hundred twenty-eight million, nine hundred thirty-three thousand, three hundred seventeen".