648373389 has 8 divisors (see below), whose sum is σ = 864716832. Its totient is φ = 432139440.

The previous prime is 648373373. The next prime is 648373403. The reversal of 648373389 is 983373846.

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

It is not a de Polignac number, because 648373389 - 2⁴ = 648373373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648378389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12382 + ... + 38079.

It is an arithmetic number, because the mean of its divisors is an integer number (108089604).

Almost surely, 2^648373389 is an apocalyptic number.

It is an amenable number.

648373389 is a deficient number, since it is larger than the sum of its proper divisors (216343443).

648373389 is a wasteful number, since it uses less digits than its factorization.

648373389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54747.

The product of its digits is 2612736, while the sum is 51.

The square root of 648373389 is about 25463.1771191264. The cubic root of 648373389 is about 865.5159201854.

The spelling of 648373389 in words is "six hundred forty-eight million, three hundred seventy-three thousand, three hundred eighty-nine".