423540349 has 2 divisors, whose sum is σ = 423540350. Its totient is φ = 423540348.

The previous prime is 423540323. The next prime is 423540401. The reversal of 423540349 is 943045324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287980900 + 135559449 = 16970^2 + 11643^2 .

It is a cyclic number.

It is not a de Polignac number, because 423540349 - 2⁵ = 423540317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423540149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211770174 + 211770175.

It is an arithmetic number, because the mean of its divisors is an integer number (211770175).

Almost surely, 2^423540349 is an apocalyptic number.

It is an amenable number.

423540349 is a deficient number, since it is larger than the sum of its proper divisors (1).

423540349 is an equidigital number, since it uses as much as digits as its factorization.

423540349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 423540349 is about 20580.0959424391. The cubic root of 423540349 is about 750.9855777628.

The spelling of 423540349 in words is "four hundred twenty-three million, five hundred forty thousand, three hundred forty-nine".