648385427 has 4 divisors (see below), whose sum is σ = 648735696. Its totient is φ = 648035160.

The previous prime is 648385421. The next prime is 648385453. The reversal of 648385427 is 724583846.

648385427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648385427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648385421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172343 + ... + 176064.

It is an arithmetic number, because the mean of its divisors is an integer number (162183924).

Almost surely, 2^648385427 is an apocalyptic number.

648385427 is a deficient number, since it is larger than the sum of its proper divisors (350269).

648385427 is a wasteful number, since it uses less digits than its factorization.

648385427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350268.

The product of its digits is 1290240, while the sum is 47.

The square root of 648385427 is about 25463.4134985866. The cubic root of 648385427 is about 865.5212766751.

The spelling of 648385427 in words is "six hundred forty-eight million, three hundred eighty-five thousand, four hundred twenty-seven".