649603569 has 4 divisors (see below), whose sum is σ = 866138096. Its totient is φ = 433069044.

The previous prime is 649603529. The next prime is 649603589. The reversal of 649603569 is 965306946.

It is a happy number.

649603569 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.

It is not a de Polignac number, because 649603569 - 2⁷ = 649603441 is a prime.

It is a super-2 number, since 2×649603569² = 843969593715075522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649603519) 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, 108267259 + ... + 108267264.

It is an arithmetic number, because the mean of its divisors is an integer number (216534524).

Almost surely, 2^649603569 is an apocalyptic number.

It is an amenable number.

649603569 is a deficient number, since it is larger than the sum of its proper divisors (216534527).

649603569 is a wasteful number, since it uses less digits than its factorization.

649603569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216534526.

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 649603569 is about 25487.3217306174. The cubic root of 649603569 is about 866.0629648938.

The spelling of 649603569 in words is "six hundred forty-nine million, six hundred three thousand, five hundred sixty-nine".