1489581889 has 2 divisors, whose sum is σ = 1489581890. Its totient is φ = 1489581888.

The previous prime is 1489581833. The next prime is 1489581923. The reversal of 1489581889 is 9881859841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991935025 + 497646864 = 31495^2 + 22308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1489581889 - 2¹³ = 1489573697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1489581829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744790944 + 744790945.

It is an arithmetic number, because the mean of its divisors is an integer number (744790945).

Almost surely, 2^1489581889 is an apocalyptic number.

It is an amenable number.

1489581889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1489581889 is an equidigital number, since it uses as much as digits as its factorization.

1489581889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 61.

The square root of 1489581889 is about 38595.1018783472. The cubic root of 1489581889 is about 1142.0579143699.

The spelling of 1489581889 in words is "one billion, four hundred eighty-nine million, five hundred eighty-one thousand, eight hundred eighty-nine".