649883 has 4 divisors (see below), whose sum is σ = 699888. Its totient is φ = 599880.

The previous prime is 649879. The next prime is 649897. The reversal of 649883 is 388946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649883 - 2² = 649879 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649883.

It is not an unprimeable number, because it can be changed into a prime (649813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24983 + ... + 25008.

It is an arithmetic number, because the mean of its divisors is an integer number (174972).

2⁶⁴⁹⁸⁸³ is an apocalyptic number.

649883 is a deficient number, since it is larger than the sum of its proper divisors (50005).

649883 is a wasteful number, since it uses less digits than its factorization.

649883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50004.

The product of its digits is 41472, while the sum is 38.

The square root of 649883 is about 806.1532112446. The cubic root of 649883 is about 86.6187127876.

The spelling of 649883 in words is "six hundred forty-nine thousand, eight hundred eighty-three".