648372353 has 4 divisors (see below), whose sum is σ = 649216260. Its totient is φ = 647528448.

The previous prime is 648372337. The next prime is 648372371. The reversal of 648372353 is 353273846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 353273846 = 2 ⋅176636923.

It can be written as a sum of positive squares in 2 ways, for example, as 427166224 + 221206129 = 20668^2 + 14873^2 .

It is a cyclic number.

It is not a de Polignac number, because 648372353 - 2⁴ = 648372337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648372353.

It is not an unprimeable number, because it can be changed into a prime (648872353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420800 + ... + 422337.

It is an arithmetic number, because the mean of its divisors is an integer number (162304065).

Almost surely, 2^648372353 is an apocalyptic number.

It is an amenable number.

648372353 is a deficient number, since it is larger than the sum of its proper divisors (843907).

648372353 is an equidigital number, since it uses as much as digits as its factorization.

648372353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843906.

The product of its digits is 362880, while the sum is 41.

The square root of 648372353 is about 25463.1567760166. The cubic root of 648372353 is about 865.5154591984.

The spelling of 648372353 in words is "six hundred forty-eight million, three hundred seventy-two thousand, three hundred fifty-three".