1439122869 has 20 divisors (see below), whose sum is σ = 2159055756. Its totient is φ = 955285056.

The previous prime is 1439122849. The next prime is 1439122873. The reversal of 1439122869 is 9682219341.

It can be written as a sum of positive squares in 2 ways, for example, as 351112644 + 1088010225 = 18738^2 + 32985^2 .

It is not a de Polignac number, because 1439122869 - 2⁹ = 1439122357 is a prime.

It is a super-2 number, since 2×1439122869² = 4142149264157582322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439122829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19254 + ... + 56999.

Almost surely, 2^1439122869 is an apocalyptic number.

It is an amenable number.

1439122869 is a deficient number, since it is larger than the sum of its proper divisors (719932887).

1439122869 is an equidigital number, since it uses as much as digits as its factorization.

1439122869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76498 (or 76489 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1439122869 is about 37935.7729458621. The cubic root of 1439122869 is about 1129.0139070125.

The spelling of 1439122869 in words is "one billion, four hundred thirty-nine million, one hundred twenty-two thousand, eight hundred sixty-nine".