1489349981 has 8 divisors (see below), whose sum is σ = 1776119424. Its totient is φ = 1221081840.

The previous prime is 1489349977. The next prime is 1489349987. The reversal of 1489349981 is 1899439841.

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 1489349981 - 2² = 1489349977 is a prime.

It is a super-2 number, since 2×1489349981² = 4436326731809400722, 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 (1489349987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4625150 + ... + 4625471.

It is an arithmetic number, because the mean of its divisors is an integer number (222014928).

Almost surely, 2^1489349981 is an apocalyptic number.

It is an amenable number.

1489349981 is a deficient number, since it is larger than the sum of its proper divisors (286769443).

1489349981 is an equidigital number, since it uses as much as digits as its factorization.

1489349981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250651.

The product of its digits is 2239488, while the sum is 56.

The square root of 1489349981 is about 38592.0973905280. The cubic root of 1489349981 is about 1141.9986435739.

The spelling of 1489349981 in words is "one billion, four hundred eighty-nine million, three hundred forty-nine thousand, nine hundred eighty-one".