649694 has 4 divisors (see below), whose sum is σ = 974544. Its totient is φ = 324846.

The previous prime is 649661. The next prime is 649697. The reversal of 649694 is 496946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 496946 = 2 ⋅248473.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649694.

It is not an unprimeable number, because it can be changed into a prime (649697) 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 as a sum of consecutive naturals, namely, 162422 + ... + 162425.

It is an arithmetic number, because the mean of its divisors is an integer number (243636).

2⁶⁴⁹⁶⁹⁴ is an apocalyptic number.

649694 is a deficient number, since it is larger than the sum of its proper divisors (324850).

649694 is a wasteful number, since it uses less digits than its factorization.

649694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324849.

The product of its digits is 46656, while the sum is 38.

The square root of 649694 is about 806.0359793458. The cubic root of 649694 is about 86.6103151099.

The spelling of 649694 in words is "six hundred forty-nine thousand, six hundred ninety-four".