423039949 has 2 divisors, whose sum is σ = 423039950. Its totient is φ = 423039948.

The previous prime is 423039937. The next prime is 423040031. The reversal of 423039949 is 949930324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334341225 + 88698724 = 18285^2 + 9418^2 .

It is a cyclic number.

It is not a de Polignac number, because 423039949 - 2⁷ = 423039821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423039049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211519974 + 211519975.

It is an arithmetic number, because the mean of its divisors is an integer number (211519975).

Almost surely, 2^423039949 is an apocalyptic number.

It is an amenable number.

423039949 is a deficient number, since it is larger than the sum of its proper divisors (1).

423039949 is an equidigital number, since it uses as much as digits as its factorization.

423039949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 423039949 is about 20567.9349716981. The cubic root of 423039949 is about 750.6897056951.

The spelling of 423039949 in words is "four hundred twenty-three million, thirty-nine thousand, nine hundred forty-nine".