647385946 has 4 divisors (see below), whose sum is σ = 971078922. Its totient is φ = 323692972.

The previous prime is 647385923. The next prime is 647385953. The reversal of 647385946 is 649583746.

647385946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 514790721 + 132595225 = 22689^2 + 11515^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647385893 and 647385902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161846485 + ... + 161846488.

Almost surely, 2^647385946 is an apocalyptic number.

647385946 is a deficient number, since it is larger than the sum of its proper divisors (323692976).

647385946 is a wasteful number, since it uses less digits than its factorization.

647385946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323692975.

The product of its digits is 4354560, while the sum is 52.

The square root of 647385946 is about 25443.7801043791. The cubic root of 647385946 is about 865.0763165651.

The spelling of 647385946 in words is "six hundred forty-seven million, three hundred eighty-five thousand, nine hundred forty-six".