439133969 has 2 divisors, whose sum is σ = 439133970. Its totient is φ = 439133968.

The previous prime is 439133957. The next prime is 439133971. The reversal of 439133969 is 969331934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324900625 + 114233344 = 18025^2 + 10688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439133969 is a prime.

It is a super-2 number, since 2×439133969² = 385677285459385922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 439133971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (439133999) 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, 219566984 + 219566985.

It is an arithmetic number, because the mean of its divisors is an integer number (219566985).

Almost surely, 2^439133969 is an apocalyptic number.

It is an amenable number.

439133969 is a deficient number, since it is larger than the sum of its proper divisors (1).

439133969 is an equidigital number, since it uses as much as digits as its factorization.

439133969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472392, while the sum is 47.

The square root of 439133969 is about 20955.5235916452. The cubic root of 439133969 is about 760.0911530788.

The spelling of 439133969 in words is "four hundred thirty-nine million, one hundred thirty-three thousand, nine hundred sixty-nine".