648632833 has 8 divisors (see below), whose sum is σ = 665077896. Its totient is φ = 632217600.

The previous prime is 648632827. The next prime is 648632837. The reversal of 648632833 is 338236846.

It can be written as a sum of positive squares in 4 ways, for example, as 7884864 + 640747969 = 2808^2 + 25313^2 .

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 648632833 - 2²⁹ = 111761921 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 648632833.

It is not an unprimeable number, because it can be changed into a prime (648632837) 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, 40413 + ... + 54133.

It is an arithmetic number, because the mean of its divisors is an integer number (83134737).

Almost surely, 2^648632833 is an apocalyptic number.

It is an amenable number.

648632833 is a deficient number, since it is larger than the sum of its proper divisors (16445063).

648632833 is a wasteful number, since it uses less digits than its factorization.

648632833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14915.

The product of its digits is 497664, while the sum is 43.

The square root of 648632833 is about 25468.2711034730. The cubic root of 648632833 is about 865.6313490270.

The spelling of 648632833 in words is "six hundred forty-eight million, six hundred thirty-two thousand, eight hundred thirty-three".