439814218469 has 2 divisors, whose sum is σ = 439814218470. Its totient is φ = 439814218468.

The previous prime is 439814218439. The next prime is 439814218471. The reversal of 439814218469 is 964812418934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364991181025 + 74823037444 = 604145^2 + 273538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439814218469 is a prime.

It is a super-2 number, since 2×439814218469² (a number of 24 digits) contains 22 as substring.

Together with 439814218471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439814218439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219907109234 + 219907109235.

It is an arithmetic number, because the mean of its divisors is an integer number (219907109235).

Almost surely, 2^439814218469 is an apocalyptic number.

It is an amenable number.

439814218469 is a deficient number, since it is larger than the sum of its proper divisors (1).

439814218469 is an equidigital number, since it uses as much as digits as its factorization.

439814218469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 59.

The spelling of 439814218469 in words is "four hundred thirty-nine billion, eight hundred fourteen million, two hundred eighteen thousand, four hundred sixty-nine".