1489497649 has 4 divisors (see below), whose sum is σ = 1498107636. Its totient is φ = 1480887664.

The previous prime is 1489497643. The next prime is 1489497671. The reversal of 1489497649 is 9467949841.

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 1127280625 + 362217024 = 33575^2 + 19032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1489497649 - 2⁵ = 1489497617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1489497643) 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 3 ways as a sum of consecutive naturals, for example, 4304734 + ... + 4305079.

It is an arithmetic number, because the mean of its divisors is an integer number (374526909).

Almost surely, 2^1489497649 is an apocalyptic number.

It is an amenable number.

1489497649 is a deficient number, since it is larger than the sum of its proper divisors (8609987).

1489497649 is an equidigital number, since it uses as much as digits as its factorization.

1489497649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609986.

The product of its digits is 15676416, while the sum is 61.

The square root of 1489497649 is about 38594.0105327239. The cubic root of 1489497649 is about 1142.0363851132.

The spelling of 1489497649 in words is "one billion, four hundred eighty-nine million, four hundred ninety-seven thousand, six hundred forty-nine".