649985347 has 8 divisors (see below), whose sum is σ = 710069760. Its totient is φ = 590066760.

The previous prime is 649985321. The next prime is 649985351. The reversal of 649985347 is 743589946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649985347 - 2²⁷ = 515767619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649985447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33183 + ... + 49000.

It is an arithmetic number, because the mean of its divisors is an integer number (88758720).

Almost surely, 2^649985347 is an apocalyptic number.

649985347 is a deficient number, since it is larger than the sum of its proper divisors (60084413).

649985347 is a wasteful number, since it uses less digits than its factorization.

649985347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82913.

The product of its digits is 6531840, while the sum is 55.

The square root of 649985347 is about 25494.8101973715. The cubic root of 649985347 is about 866.2325960604.

The spelling of 649985347 in words is "six hundred forty-nine million, nine hundred eighty-five thousand, three hundred forty-seven".