648914293 has 8 divisors (see below), whose sum is σ = 687457368. Its totient is φ = 610412544.

The previous prime is 648914291. The next prime is 648914297. The reversal of 648914293 is 392419846.

It can be written as a sum of positive squares in 4 ways, for example, as 200448964 + 448465329 = 14158^2 + 21177^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 648914293 - 2¹ = 648914291 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 (648914291) 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, 25605 + ... + 44197.

It is an arithmetic number, because the mean of its divisors is an integer number (85932171).

Almost surely, 2^648914293 is an apocalyptic number.

It is an amenable number.

648914293 is a deficient number, since it is larger than the sum of its proper divisors (38543075).

648914293 is a wasteful number, since it uses less digits than its factorization.

648914293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663.

The product of its digits is 373248, while the sum is 46.

The square root of 648914293 is about 25473.7962031575. The cubic root of 648914293 is about 865.7565381709.

The spelling of 648914293 in words is "six hundred forty-eight million, nine hundred fourteen thousand, two hundred ninety-three".