428429723 has 2 divisors, whose sum is σ = 428429724. Its totient is φ = 428429722.

The previous prime is 428429707. The next prime is 428429753. The reversal of 428429723 is 327924824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428429723 - 2⁴ = 428429707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (428429753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214214861 + 214214862.

It is an arithmetic number, because the mean of its divisors is an integer number (214214862).

Almost surely, 2^428429723 is an apocalyptic number.

428429723 is a deficient number, since it is larger than the sum of its proper divisors (1).

428429723 is an equidigital number, since it uses as much as digits as its factorization.

428429723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 428429723 is about 20698.5439826090. The cubic root of 428429723 is about 753.8643353166.

The spelling of 428429723 in words is "four hundred twenty-eight million, four hundred twenty-nine thousand, seven hundred twenty-three".