649322801 has 4 divisors (see below), whose sum is σ = 653623104. Its totient is φ = 645022500.

The previous prime is 649322783. The next prime is 649322873. The reversal of 649322801 is 108223946.

649322801 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 108223946 = 2 ⋅54111973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649322801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649322101) 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, 2149925 + ... + 2150226.

It is an arithmetic number, because the mean of its divisors is an integer number (163405776).

Almost surely, 2^649322801 is an apocalyptic number.

It is an amenable number.

649322801 is a deficient number, since it is larger than the sum of its proper divisors (4300303).

649322801 is a wasteful number, since it uses less digits than its factorization.

649322801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300302.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 649322801 is about 25481.8131419254. The cubic root of 649322801 is about 865.9381719589.

The spelling of 649322801 in words is "six hundred forty-nine million, three hundred twenty-two thousand, eight hundred one".