649802 has 4 divisors (see below), whose sum is σ = 974706. Its totient is φ = 324900.

The previous prime is 649801. The next prime is 649813. The reversal of 649802 is 208946.

649802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 208946 = 2 ⋅104473.

It can be written as a sum of positive squares in only one way, i.e., 326041 + 323761 = 571^2 + 569^2 .

It is not an unprimeable number, because it can be changed into a prime (649801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162449 + ... + 162452.

2⁶⁴⁹⁸⁰² is an apocalyptic number.

649802 is a deficient number, since it is larger than the sum of its proper divisors (324904).

649802 is a wasteful number, since it uses less digits than its factorization.

649802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324903.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 649802 is about 806.1029710899. The cubic root of 649802 is about 86.6151139822.

The spelling of 649802 in words is "six hundred forty-nine thousand, eight hundred two".