649597 has 8 divisors (see below), whose sum is σ = 707616. Its totient is φ = 592752.

The previous prime is 649577. The next prime is 649613. The reversal of 649597 is 795946.

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 649597 - 2⁷ = 649469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649507) 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, 1158 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (88452).

2⁶⁴⁹⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

649597 is a deficient number, since it is larger than the sum of its proper divisors (58019).

649597 is a wasteful number, since it uses less digits than its factorization.

649597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its digits is 68040, while the sum is 40.

The square root of 649597 is about 805.9758060885. The cubic root of 649597 is about 86.6060045582.

The spelling of 649597 in words is "six hundred forty-nine thousand, five hundred ninety-seven".