649797 has 8 divisors (see below), whose sum is σ = 872256. Its totient is φ = 430272.

The previous prime is 649793. The next prime is 649799. The reversal of 649797 is 797946.

649797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649797 - 2² = 649793 is a prime.

It is a super-3 number, since 3×649797³ = 823103333547553719, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649793) 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, 148 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (109032).

2⁶⁴⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

649797 is a deficient number, since it is larger than the sum of its proper divisors (222459).

649797 is a wasteful number, since it uses less digits than its factorization.

649797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467.

The product of its digits is 95256, while the sum is 42.

The square root of 649797 is about 806.0998697432. The cubic root of 649797 is about 86.6148918240.

The spelling of 649797 in words is "six hundred forty-nine thousand, seven hundred ninety-seven".