648459393 has 8 divisors (see below), whose sum is σ = 884719968. Its totient is φ = 422252544.

The previous prime is 648459391. The next prime is 648459397. The reversal of 648459393 is 393954846.

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

It is not a de Polignac number, because 648459393 - 2¹ = 648459391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648459391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2513280 + ... + 2513537.

It is an arithmetic number, because the mean of its divisors is an integer number (110589996).

Almost surely, 2^648459393 is an apocalyptic number.

It is an amenable number.

648459393 is a deficient number, since it is larger than the sum of its proper divisors (236260575).

648459393 is a wasteful number, since it uses less digits than its factorization.

648459393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026863.

The product of its digits is 2799360, while the sum is 51.

The square root of 648459393 is about 25464.8658547419. The cubic root of 648459393 is about 865.5541875076.

The spelling of 648459393 in words is "six hundred forty-eight million, four hundred fifty-nine thousand, three hundred ninety-three".