647499716 has 18 divisors (see below), whose sum is σ = 1161346158. Its totient is φ = 315694560.

The previous prime is 647499673. The next prime is 647499731. The reversal of 647499716 is 617994746.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 394816900 + 252682816 = 19870^2 + 15896^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324875 + ... + 326861.

It is an arithmetic number, because the mean of its divisors is an integer number (64519231).

Almost surely, 2^647499716 is an apocalyptic number.

It is an amenable number.

647499716 is a deficient number, since it is larger than the sum of its proper divisors (513846442).

647499716 is an equidigital number, since it uses as much as digits as its factorization.

647499716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019 (or 2030 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 53.

The square root of 647499716 is about 25446.0157195581. The cubic root of 647499716 is about 865.1269890521.

The spelling of 647499716 in words is "six hundred forty-seven million, four hundred ninety-nine thousand, seven hundred sixteen".