428077213 has 2 divisors, whose sum is σ = 428077214. Its totient is φ = 428077212.

The previous prime is 428077193. The next prime is 428077253. The reversal of 428077213 is 312770824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242518329 + 185558884 = 15573^2 + 13622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428077213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428077253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214038606 + 214038607.

It is an arithmetic number, because the mean of its divisors is an integer number (214038607).

Almost surely, 2^428077213 is an apocalyptic number.

It is an amenable number.

428077213 is a deficient number, since it is larger than the sum of its proper divisors (1).

428077213 is an equidigital number, since it uses as much as digits as its factorization.

428077213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 428077213 is about 20690.0268970342. The cubic root of 428077213 is about 753.6575198847.

The spelling of 428077213 in words is "four hundred twenty-eight million, seventy-seven thousand, two hundred thirteen".