423998849 has 2 divisors, whose sum is σ = 423998850. Its totient is φ = 423998848.

The previous prime is 423998843. The next prime is 423998899. The reversal of 423998849 is 948899324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402283249 + 21715600 = 20057^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 423998849 - 2⁴ = 423998833 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423998794 and 423998803.

It is not a weakly prime, because it can be changed into another prime (423998843) 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, 211999424 + 211999425.

It is an arithmetic number, because the mean of its divisors is an integer number (211999425).

Almost surely, 2^423998849 is an apocalyptic number.

It is an amenable number.

423998849 is a deficient number, since it is larger than the sum of its proper divisors (1).

423998849 is an equidigital number, since it uses as much as digits as its factorization.

423998849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 56.

The square root of 423998849 is about 20591.2323332043. The cubic root of 423998849 is about 751.2564710504.

The spelling of 423998849 in words is "four hundred twenty-three million, nine hundred ninety-eight thousand, eight hundred forty-nine".