428931667 has 2 divisors, whose sum is σ = 428931668. Its totient is φ = 428931666.

The previous prime is 428931653. The next prime is 428931683. The reversal of 428931667 is 766139824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428931667 - 2¹¹ = 428929619 is a prime.

It is not a weakly prime, because it can be changed into another prime (428931647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214465833 + 214465834.

It is an arithmetic number, because the mean of its divisors is an integer number (214465834).

Almost surely, 2^428931667 is an apocalyptic number.

428931667 is a deficient number, since it is larger than the sum of its proper divisors (1).

428931667 is an equidigital number, since it uses as much as digits as its factorization.

428931667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 428931667 is about 20710.6655373506. The cubic root of 428931667 is about 754.1586270679.

The spelling of 428931667 in words is "four hundred twenty-eight million, nine hundred thirty-one thousand, six hundred sixty-seven".