1489797989 has 8 divisors (see below), whose sum is σ = 1504198080. Its totient is φ = 1475419456.

The previous prime is 1489797983. The next prime is 1489798019. The reversal of 1489797989 is 9897979841.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1489797989 - 2⁴ = 1489797973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1489797983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156632 + ... + 165870.

It is an arithmetic number, because the mean of its divisors is an integer number (188024760).

Almost surely, 2^1489797989 is an apocalyptic number.

It is an amenable number.

1489797989 is a deficient number, since it is larger than the sum of its proper divisors (14400091).

1489797989 is a wasteful number, since it uses less digits than its factorization.

1489797989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10779.

The product of its digits is 82301184, while the sum is 71.

The square root of 1489797989 is about 38597.9013548664. The cubic root of 1489797989 is about 1142.1131394375.

The spelling of 1489797989 in words is "one billion, four hundred eighty-nine million, seven hundred ninety-seven thousand, nine hundred eighty-nine".