648686873 has 8 divisors (see below), whose sum is σ = 671294976. Its totient is φ = 626184000.

The previous prime is 648686827. The next prime is 648686891. The reversal of 648686873 is 378686846.

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 648686873 - 2¹⁴ = 648670489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648686803) 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, 13661 + ... + 38522.

It is an arithmetic number, because the mean of its divisors is an integer number (83911872).

Almost surely, 2^648686873 is an apocalyptic number.

It is an amenable number.

648686873 is a deficient number, since it is larger than the sum of its proper divisors (22608103).

648686873 is a wasteful number, since it uses less digits than its factorization.

648686873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52615.

The product of its digits is 9289728, while the sum is 56.

The square root of 648686873 is about 25469.3320093009. The cubic root of 648686873 is about 865.6553880090.

The spelling of 648686873 in words is "six hundred forty-eight million, six hundred eighty-six thousand, eight hundred seventy-three".