1439089749509 has 2 divisors, whose sum is σ = 1439089749510. Its totient is φ = 1439089749508.

The previous prime is 1439089749469. The next prime is 1439089749551. The reversal of 1439089749509 is 9059479809341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1260073600900 + 179016148609 = 1122530^2 + 423103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439089749509 - 2¹⁶ = 1439089683973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1439089749569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719544874754 + 719544874755.

It is an arithmetic number, because the mean of its divisors is an integer number (719544874755).

Almost surely, 2^{1439089749509} is an apocalyptic number.

It is an amenable number.

1439089749509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439089749509 is an equidigital number, since it uses as much as digits as its factorization.

1439089749509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88179840, while the sum is 68.

The spelling of 1439089749509 in words is "one trillion, four hundred thirty-nine billion, eighty-nine million, seven hundred forty-nine thousand, five hundred nine".