648943593 has 8 divisors (see below), whose sum is σ = 865796448. Its totient is φ = 432359904.

The previous prime is 648943591. The next prime is 648943637. The reversal of 648943593 is 395349846.

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

It is not a de Polignac number, because 648943593 - 2¹ = 648943591 is a prime.

It is a super-2 number, since 2×648943593² = 842255573791499298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648943591) 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, 61596 + ... + 71357.

It is an arithmetic number, because the mean of its divisors is an integer number (108224556).

Almost surely, 2^648943593 is an apocalyptic number.

It is an amenable number.

648943593 is a deficient number, since it is larger than the sum of its proper divisors (216852855).

648943593 is a wasteful number, since it uses less digits than its factorization.

648943593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134583.

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

The square root of 648943593 is about 25474.3712974432. The cubic root of 648943593 is about 865.7695682865.

The spelling of 648943593 in words is "six hundred forty-eight million, nine hundred forty-three thousand, five hundred ninety-three".