1489931549 has 2 divisors, whose sum is σ = 1489931550. Its totient is φ = 1489931548.

The previous prime is 1489931483. The next prime is 1489931563. The reversal of 1489931549 is 9451399841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384212025 + 105719524 = 37205^2 + 10282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1489931549 - 2²⁸ = 1221496093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1489931549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1489931449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744965774 + 744965775.

It is an arithmetic number, because the mean of its divisors is an integer number (744965775).

Almost surely, 2^1489931549 is an apocalyptic number.

It is an amenable number.

1489931549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1489931549 is an equidigital number, since it uses as much as digits as its factorization.

1489931549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 53.

The square root of 1489931549 is about 38599.6314619712. The cubic root of 1489931549 is about 1142.1472684657.

The spelling of 1489931549 in words is "one billion, four hundred eighty-nine million, nine hundred thirty-one thousand, five hundred forty-nine".