648477439 has 6 divisors (see below), whose sum is σ = 671610680. Its totient is φ = 626115336.

The previous prime is 648477421. The next prime is 648477449. The reversal of 648477439 is 934774846.

It is not a de Polignac number, because 648477439 - 2¹⁹ = 647953151 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 (648477449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 384699 + ... + 386380.

Almost surely, 2^648477439 is an apocalyptic number.

648477439 is a deficient number, since it is larger than the sum of its proper divisors (23133241).

648477439 is an equidigital number, since it uses as much as digits as its factorization.

648477439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771137 (or 771108 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 52.

The square root of 648477439 is about 25465.2201836151. The cubic root of 648477439 is about 865.5622166127.

The spelling of 648477439 in words is "six hundred forty-eight million, four hundred seventy-seven thousand, four hundred thirty-nine".