647898494 has 16 divisors (see below), whose sum is σ = 983773728. Its totient is φ = 319998432.

The previous prime is 647898467. The next prime is 647898539. The reversal of 647898494 is 494898746.

It is a congruent number.

It is an unprimeable number.

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, 48359 + ... + 60285.

It is an arithmetic number, because the mean of its divisors is an integer number (61485858).

Almost surely, 2^647898494 is an apocalyptic number.

647898494 is a deficient number, since it is larger than the sum of its proper divisors (335875234).

647898494 is a wasteful number, since it uses less digits than its factorization.

647898494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12259.

The product of its digits is 13934592, while the sum is 59.

The square root of 647898494 is about 25453.8502784942. The cubic root of 647898494 is about 865.3045555703.

The spelling of 647898494 in words is "six hundred forty-seven million, eight hundred ninety-eight thousand, four hundred ninety-four".