648349947 has 16 divisors (see below), whose sum is σ = 1097735680. Its totient is φ = 370485576.

The previous prime is 648349883. The next prime is 648349951. The reversal of 648349947 is 749943846.

It is a happy number.

648349947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648349947 - 2⁶ = 648349883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648349893 and 648349902.

It is not an unprimeable number, because it can be changed into a prime (648349957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715023 + ... + 1715400.

It is an arithmetic number, because the mean of its divisors is an integer number (68608480).

Almost surely, 2^648349947 is an apocalyptic number.

648349947 is a deficient number, since it is larger than the sum of its proper divisors (449385733).

648349947 is a wasteful number, since it uses less digits than its factorization.

648349947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430439 (or 3430433 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 648349947 is about 25462.7168032007. The cubic root of 648349947 is about 865.5054891235.

The spelling of 648349947 in words is "six hundred forty-eight million, three hundred forty-nine thousand, nine hundred forty-seven".