1549494489 has 8 divisors (see below), whose sum is σ = 2099861632. Its totient is φ = 1016061840.

The previous prime is 1549494451. The next prime is 1549494493. The reversal of 1549494489 is 9844949451.

It is a happy number.

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

It is not a de Polignac number, because 1549494489 - 2⁹ = 1549493977 is a prime.

It is a super-2 number, since 2×1549494489² = 4801866342882742242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1549494409) 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, 4233409 + ... + 4233774.

It is an arithmetic number, because the mean of its divisors is an integer number (262482704).

Almost surely, 2^1549494489 is an apocalyptic number.

It is an amenable number.

1549494489 is a deficient number, since it is larger than the sum of its proper divisors (550367143).

1549494489 is an equidigital number, since it uses as much as digits as its factorization.

1549494489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8467247.

The product of its digits is 7464960, while the sum is 57.

The square root of 1549494489 is about 39363.6188504055. The cubic root of 1549494489 is about 1157.1687017308.

The spelling of 1549494489 in words is "one billion, five hundred forty-nine million, four hundred ninety-four thousand, four hundred eighty-nine".