423898729 has 2 divisors, whose sum is σ = 423898730. Its totient is φ = 423898728.

The previous prime is 423898691. The next prime is 423898733. The reversal of 423898729 is 927898324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271425625 + 152473104 = 16475^2 + 12348^2 .

It is a cyclic number.

It is not a de Polignac number, because 423898729 - 2¹⁷ = 423767657 is a prime.

It is not a weakly prime, because it can be changed into another prime (423898799) 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, 211949364 + 211949365.

It is an arithmetic number, because the mean of its divisors is an integer number (211949365).

Almost surely, 2^423898729 is an apocalyptic number.

It is an amenable number.

423898729 is a deficient number, since it is larger than the sum of its proper divisors (1).

423898729 is an equidigital number, since it uses as much as digits as its factorization.

423898729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 423898729 is about 20588.8010578567. The cubic root of 423898729 is about 751.1973343183.

The spelling of 423898729 in words is "four hundred twenty-three million, eight hundred ninety-eight thousand, seven hundred twenty-nine".