439134804781 has 2 divisors, whose sum is σ = 439134804782. Its totient is φ = 439134804780.

The previous prime is 439134804701. The next prime is 439134804809. The reversal of 439134804781 is 187408431934.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407509873225 + 31624931556 = 638365^2 + 177834^2 .

It is a cyclic number.

It is not a de Polignac number, because 439134804781 - 2²⁹ = 438597933869 is a prime.

It is a super-2 number, since 2×439134804781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439134804701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219567402390 + 219567402391.

It is an arithmetic number, because the mean of its divisors is an integer number (219567402391).

Almost surely, 2^439134804781 is an apocalyptic number.

It is an amenable number.

439134804781 is a deficient number, since it is larger than the sum of its proper divisors (1).

439134804781 is an equidigital number, since it uses as much as digits as its factorization.

439134804781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 439134804781 in words is "four hundred thirty-nine billion, one hundred thirty-four million, eight hundred four thousand, seven hundred eighty-one".