649463673 has 8 divisors (see below), whose sum is σ = 903601728. Its totient is φ = 414150704.

The previous prime is 649463663. The next prime is 649463723. The reversal of 649463673 is 376364946.

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 649463673 - 2⁵ = 649463641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649463623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4706190 + ... + 4706327.

It is an arithmetic number, because the mean of its divisors is an integer number (112950216).

Almost surely, 2^649463673 is an apocalyptic number.

It is an amenable number.

649463673 is a deficient number, since it is larger than the sum of its proper divisors (254138055).

649463673 is a wasteful number, since it uses less digits than its factorization.

649463673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412543.

The product of its digits is 1959552, while the sum is 48.

The square root of 649463673 is about 25484.5771595293. The cubic root of 649463673 is about 866.0007898234. Note that the first 3 decimals are identical.

The spelling of 649463673 in words is "six hundred forty-nine million, four hundred sixty-three thousand, six hundred seventy-three".