1489509869 has 4 divisors (see below), whose sum is σ = 1525839420. Its totient is φ = 1453180320.

The previous prime is 1489509823. The next prime is 1489509881. The reversal of 1489509869 is 9689059841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 846228100 + 643281769 = 29090^2 + 25363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1489509869 is a prime.

It is a super-2 number, since 2×1489509869² = 4437279299696794322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1489509569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18164714 + ... + 18164795.

It is an arithmetic number, because the mean of its divisors is an integer number (381459855).

Almost surely, 2^1489509869 is an apocalyptic number.

It is an amenable number.

1489509869 is a deficient number, since it is larger than the sum of its proper divisors (36329551).

1489509869 is an equidigital number, since it uses as much as digits as its factorization.

1489509869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36329550.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The square root of 1489509869 is about 38594.1688471199. The cubic root of 1489509869 is about 1142.0395082347.

The spelling of 1489509869 in words is "one billion, four hundred eighty-nine million, five hundred nine thousand, eight hundred sixty-nine".