428427473 has 2 divisors, whose sum is σ = 428427474. Its totient is φ = 428427472.

The previous prime is 428427449. The next prime is 428427499. The reversal of 428427473 is 374724824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396527569 + 31899904 = 19913^2 + 5648^2 .

It is a cyclic number.

It is not a de Polignac number, because 428427473 - 2¹⁸ = 428165329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428427473.

It is not a weakly prime, because it can be changed into another prime (428427073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214213736 + 214213737.

It is an arithmetic number, because the mean of its divisors is an integer number (214213737).

Almost surely, 2^428427473 is an apocalyptic number.

It is an amenable number.

428427473 is a deficient number, since it is larger than the sum of its proper divisors (1).

428427473 is an equidigital number, since it uses as much as digits as its factorization.

428427473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 41.

The square root of 428427473 is about 20698.4896308885. The cubic root of 428427473 is about 753.8630156154.

The spelling of 428427473 in words is "four hundred twenty-eight million, four hundred twenty-seven thousand, four hundred seventy-three".