648623679 has 8 divisors (see below), whose sum is σ = 943452672. Its totient is φ = 393105240.

The previous prime is 648623663. The next prime is 648623681. The reversal of 648623679 is 976326846.

It is a happy number.

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

It is not a de Polignac number, because 648623679 - 2⁴ = 648623663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648623629) 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, 9827599 + ... + 9827664.

It is an arithmetic number, because the mean of its divisors is an integer number (117931584).

Almost surely, 2^648623679 is an apocalyptic number.

648623679 is a deficient number, since it is larger than the sum of its proper divisors (294828993).

648623679 is a wasteful number, since it uses less digits than its factorization.

648623679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19655277.

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

The square root of 648623679 is about 25468.0913890303. The cubic root of 648623679 is about 865.6272768585.

The spelling of 648623679 in words is "six hundred forty-eight million, six hundred twenty-three thousand, six hundred seventy-nine".