439913429 has 2 divisors, whose sum is σ = 439913430. Its totient is φ = 439913428.

The previous prime is 439913389. The next prime is 439913449. The reversal of 439913429 is 924319934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426422500 + 13490929 = 20650^2 + 3673^2 .

It is a cyclic number.

It is not a de Polignac number, because 439913429 - 2¹⁶ = 439847893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 439913429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439913449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219956714 + 219956715.

It is an arithmetic number, because the mean of its divisors is an integer number (219956715).

Almost surely, 2^439913429 is an apocalyptic number.

It is an amenable number.

439913429 is a deficient number, since it is larger than the sum of its proper divisors (1).

439913429 is an equidigital number, since it uses as much as digits as its factorization.

439913429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 439913429 is about 20974.1133066454. The cubic root of 439913429 is about 760.5406062444.

The spelling of 439913429 in words is "four hundred thirty-nine million, nine hundred thirteen thousand, four hundred twenty-nine".