1439267989 has 2 divisors, whose sum is σ = 1439267990. Its totient is φ = 1439267988.

The previous prime is 1439267953. The next prime is 1439268001. The reversal of 1439267989 is 9897629341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1409401764 + 29866225 = 37542^2 + 5465^2 .

It is an emirp because it is prime and its reverse (9897629341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1439267989 - 2¹⁹ = 1438743701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1439267939) 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 as a sum of consecutive naturals, namely, 719633994 + 719633995.

It is an arithmetic number, because the mean of its divisors is an integer number (719633995).

Almost surely, 2^1439267989 is an apocalyptic number.

It is an amenable number.

1439267989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439267989 is an equidigital number, since it uses as much as digits as its factorization.

1439267989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The square root of 1439267989 is about 37937.6856041588. The cubic root of 1439267989 is about 1129.0518553570.

The spelling of 1439267989 in words is "one billion, four hundred thirty-nine million, two hundred sixty-seven thousand, nine hundred eighty-nine".