649117 has 8 divisors (see below), whose sum is σ = 758016. Its totient is φ = 544272.

The previous prime is 649093. The next prime is 649123. The reversal of 649117 is 711946.

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 649117 - 2¹¹ = 647069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649147) 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, 658 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (94752).

2⁶⁴⁹¹¹⁷ is an apocalyptic number.

649117 is the 658-th pentagonal number.

It is an amenable number.

649117 is a deficient number, since it is larger than the sum of its proper divisors (108899).

649117 is a wasteful number, since it uses less digits than its factorization.

649117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027.

The product of its digits is 1512, while the sum is 28.

The square root of 649117 is about 805.6779753723. The cubic root of 649117 is about 86.5846676752.

The spelling of 649117 in words is "six hundred forty-nine thousand, one hundred seventeen".