647473822 has 4 divisors (see below), whose sum is σ = 971210736. Its totient is φ = 323736910.

The previous prime is 647473819. The next prime is 647473829. The reversal of 647473822 is 228374746.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647473829) 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 as a sum of consecutive naturals, namely, 161868454 + ... + 161868457.

It is an arithmetic number, because the mean of its divisors is an integer number (242802684).

Almost surely, 2^647473822 is an apocalyptic number.

647473822 is a deficient number, since it is larger than the sum of its proper divisors (323736914).

647473822 is a wasteful number, since it uses less digits than its factorization.

647473822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323736913.

The product of its digits is 451584, while the sum is 43.

The square root of 647473822 is about 25445.5069118302. The cubic root of 647473822 is about 865.1154565389.

The spelling of 647473822 in words is "six hundred forty-seven million, four hundred seventy-three thousand, eight hundred twenty-two".