428359691 has 2 divisors, whose sum is σ = 428359692. Its totient is φ = 428359690.

The previous prime is 428359637. The next prime is 428359699. The reversal of 428359691 is 196953824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428359691 - 2¹⁸ = 428097547 is a prime.

It is not a weakly prime, because it can be changed into another prime (428359699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214179845 + 214179846.

It is an arithmetic number, because the mean of its divisors is an integer number (214179846).

Almost surely, 2^428359691 is an apocalyptic number.

428359691 is a deficient number, since it is larger than the sum of its proper divisors (1).

428359691 is an equidigital number, since it uses as much as digits as its factorization.

428359691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 428359691 is about 20696.8522002743. The cubic root of 428359691 is about 753.8232570089.

The spelling of 428359691 in words is "four hundred twenty-eight million, three hundred fifty-nine thousand, six hundred ninety-one".