649068947 has 8 divisors (see below), whose sum is σ = 680697600. Its totient is φ = 617724360.

The previous prime is 649068943. The next prime is 649068967. The reversal of 649068947 is 749860946.

It is a happy number.

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 649068947 - 2² = 649068943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649068941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66329 + ... + 75482.

It is an arithmetic number, because the mean of its divisors is an integer number (85087200).

Almost surely, 2^649068947 is an apocalyptic number.

649068947 is a deficient number, since it is larger than the sum of its proper divisors (31628653).

649068947 is a wasteful number, since it uses less digits than its factorization.

649068947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142033.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 649068947 is about 25476.8315730194. The cubic root of 649068947 is about 865.8253105176.

The spelling of 649068947 in words is "six hundred forty-nine million, sixty-eight thousand, nine hundred forty-seven".