1489945469 has 4 divisors (see below), whose sum is σ = 1490204700. Its totient is φ = 1489686240.

The previous prime is 1489945463. The next prime is 1489945481. The reversal of 1489945469 is 9645499841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9645499841 = 499 ⋅19329659.

It can be written as a sum of positive squares in 2 ways, for example, as 1144468900 + 345476569 = 33830^2 + 18587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1489945469 - 2⁸ = 1489945213 is a prime.

It is a super-2 number, since 2×1489945469² = 4439875001187259922, 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 (1489945463) 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, 120794 + ... + 132555.

It is an arithmetic number, because the mean of its divisors is an integer number (372551175).

Almost surely, 2^1489945469 is an apocalyptic number.

It is an amenable number.

1489945469 is a deficient number, since it is larger than the sum of its proper divisors (259231).

1489945469 is an equidigital number, since it uses as much as digits as its factorization.

1489945469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259230.

The product of its digits is 11197440, while the sum is 59.

The square root of 1489945469 is about 38599.8117741525. The cubic root of 1489945469 is about 1142.1508253719.

The spelling of 1489945469 in words is "one billion, four hundred eighty-nine million, nine hundred forty-five thousand, four hundred sixty-nine".