428219417 has 2 divisors, whose sum is σ = 428219418. Its totient is φ = 428219416.

The previous prime is 428219411. The next prime is 428219431. The reversal of 428219417 is 714912824.

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., 400960576 + 27258841 = 20024^2 + 5221^2 .

It is a cyclic number.

It is not a de Polignac number, because 428219417 - 2²² = 424025113 is a prime.

It is a Chen prime.

It is equal to p_22758419 and since 428219417 and 22758419 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (428219411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214109708 + 214109709.

It is an arithmetic number, because the mean of its divisors is an integer number (214109709).

Almost surely, 2^428219417 is an apocalyptic number.

It is an amenable number.

428219417 is a deficient number, since it is larger than the sum of its proper divisors (1).

428219417 is an equidigital number, since it uses as much as digits as its factorization.

428219417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 428219417 is about 20693.4631466074. The cubic root of 428219417 is about 753.7409637475.

The spelling of 428219417 in words is "four hundred twenty-eight million, two hundred nineteen thousand, four hundred seventeen".