649706 has 16 divisors (see below), whose sum is σ = 1047816. Its totient is φ = 301056.

The previous prime is 649697. The next prime is 649709. The reversal of 649706 is 607946.

It can be written as a sum of positive squares in 4 ways, for example, as 648025 + 1681 = 805^2 + 41^2 .

It is not an unprimeable number, because it can be changed into a prime (649709) by changing a digit.

649706 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3200 + ... + 3396.

2⁶⁴⁹⁷⁰⁶ is an apocalyptic number.

649706 is a deficient number, since it is larger than the sum of its proper divisors (398110).

649706 is a wasteful number, since it uses less digits than its factorization.

649706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 649706 is about 806.0434231479. The cubic root of 649706 is about 86.6108483442.

The spelling of 649706 in words is "six hundred forty-nine thousand, seven hundred six".