648943589 has 8 divisors (see below), whose sum is σ = 749983680. Its totient is φ = 549986976.

The previous prime is 648943543. The next prime is 648943591. The reversal of 648943589 is 985349846.

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 648943589 - 2¹² = 648939493 is a prime.

It is a super-2 number, since 2×648943589² = 842255563408401842, 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 (648942589) 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, 520199 + ... + 521444.

It is an arithmetic number, because the mean of its divisors is an integer number (93747960).

Almost surely, 2^648943589 is an apocalyptic number.

It is an amenable number.

648943589 is a deficient number, since it is larger than the sum of its proper divisors (101040091).

648943589 is a wasteful number, since it uses less digits than its factorization.

648943589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041739.

The product of its digits is 7464960, while the sum is 56.

The square root of 648943589 is about 25474.3712189330. The cubic root of 648943589 is about 865.7695665077.

The spelling of 648943589 in words is "six hundred forty-eight million, nine hundred forty-three thousand, five hundred eighty-nine".