428443273 has 2 divisors, whose sum is σ = 428443274. Its totient is φ = 428443272.

The previous prime is 428443259. The next prime is 428443289. The reversal of 428443273 is 372344824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370485504 + 57957769 = 19248^2 + 7613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428443273 is a prime.

It is not a weakly prime, because it can be changed into another prime (428443243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214221636 + 214221637.

It is an arithmetic number, because the mean of its divisors is an integer number (214221637).

Almost surely, 2^428443273 is an apocalyptic number.

It is an amenable number.

428443273 is a deficient number, since it is larger than the sum of its proper divisors (1).

428443273 is an equidigital number, since it uses as much as digits as its factorization.

428443273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 37.

The square root of 428443273 is about 20698.8712977302. The cubic root of 428443273 is about 753.8722827531.

The spelling of 428443273 in words is "four hundred twenty-eight million, four hundred forty-three thousand, two hundred seventy-three".