649996 has 6 divisors (see below), whose sum is σ = 1137500. Its totient is φ = 324996.

The previous prime is 649991. The next prime is 650011. The reversal of 649996 is 699946.

It is a happy number.

649996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 6 and 49996 contains 649996 itself.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (649991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81246 + ... + 81253.

2⁶⁴⁹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

649996 is a deficient number, since it is larger than the sum of its proper divisors (487504).

649996 is a wasteful number, since it uses less digits than its factorization.

649996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162503 (or 162501 counting only the distinct ones).

The product of its digits is 104976, while the sum is 43.

The square root of 649996 is about 806.2232941313. The cubic root of 649996 is about 86.6237328437.

The spelling of 649996 in words is "six hundred forty-nine thousand, nine hundred ninety-six".