428149723 has 2 divisors, whose sum is σ = 428149724. Its totient is φ = 428149722.

The previous prime is 428149691. The next prime is 428149739. The reversal of 428149723 is 327941824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428149723 - 2⁵ = 428149691 is a prime.

It is not a weakly prime, because it can be changed into another prime (428149783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214074861 + 214074862.

It is an arithmetic number, because the mean of its divisors is an integer number (214074862).

Almost surely, 2^428149723 is an apocalyptic number.

428149723 is a deficient number, since it is larger than the sum of its proper divisors (1).

428149723 is an equidigital number, since it uses as much as digits as its factorization.

428149723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 428149723 is about 20691.7791163544. The cubic root of 428149723 is about 753.7000703249.

The spelling of 428149723 in words is "four hundred twenty-eight million, one hundred forty-nine thousand, seven hundred twenty-three".