1439977489 has 2 divisors, whose sum is σ = 1439977490. Its totient is φ = 1439977488.

The previous prime is 1439977481. The next prime is 1439977501. The reversal of 1439977489 is 9847799341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1351297600 + 88679889 = 36760^2 + 9417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439977489 - 2³ = 1439977481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1439977481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719988744 + 719988745.

It is an arithmetic number, because the mean of its divisors is an integer number (719988745).

Almost surely, 2^1439977489 is an apocalyptic number.

It is an amenable number.

1439977489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439977489 is an equidigital number, since it uses as much as digits as its factorization.

1439977489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 61.

The square root of 1439977489 is about 37947.0353123930. The cubic root of 1439977489 is about 1129.2373502760.

The spelling of 1439977489 in words is "one billion, four hundred thirty-nine million, nine hundred seventy-seven thousand, four hundred eighty-nine".