649655 has 8 divisors (see below), whose sum is σ = 825552. Its totient is φ = 489088.

The previous prime is 649651. The next prime is 649657. The reversal of 649655 is 556946.

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 649655 - 2² = 649651 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3737 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2⁶⁴⁹⁶⁵⁵ is an apocalyptic number.

649655 is a deficient number, since it is larger than the sum of its proper divisors (175897).

649655 is a wasteful number, since it uses less digits than its factorization.

649655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7665.

The product of its digits is 32400, while the sum is 35.

The square root of 649655 is about 806.0117865143. The cubic root of 649655 is about 86.6085820530.

The spelling of 649655 in words is "six hundred forty-nine thousand, six hundred fifty-five".