428429497 has 2 divisors, whose sum is σ = 428429498. Its totient is φ = 428429496.

The previous prime is 428429479. The next prime is 428429509. The reversal of 428429497 is 794924824.

It is a happy number.

Together with previous prime (428429479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348344896 + 80084601 = 18664^2 + 8949^2 .

It is a cyclic number.

It is not a de Polignac number, because 428429497 - 2¹¹ = 428427449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428429497.

It is not a weakly prime, because it can be changed into another prime (428423497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214214748 + 214214749.

It is an arithmetic number, because the mean of its divisors is an integer number (214214749).

Almost surely, 2^428429497 is an apocalyptic number.

It is an amenable number.

428429497 is a deficient number, since it is larger than the sum of its proper divisors (1).

428429497 is an equidigital number, since it uses as much as digits as its factorization.

428429497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 428429497 is about 20698.5385232871. The cubic root of 428429497 is about 753.8642027602.

The spelling of 428429497 in words is "four hundred twenty-eight million, four hundred twenty-nine thousand, four hundred ninety-seven".