649907323 has 4 divisors (see below), whose sum is σ = 699900208. Its totient is φ = 599914440.

The previous prime is 649907317. The next prime is 649907327. The reversal of 649907323 is 323709946.

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 649907323 - 2²⁹ = 113036411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649907323.

It is not an unprimeable number, because it can be changed into a prime (649907327) 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, 24996423 + ... + 24996448.

It is an arithmetic number, because the mean of its divisors is an integer number (174975052).

Almost surely, 2^649907323 is an apocalyptic number.

649907323 is a deficient number, since it is larger than the sum of its proper divisors (49992885).

649907323 is a wasteful number, since it uses less digits than its factorization.

649907323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49992884.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 649907323 is about 25493.2799576673. The cubic root of 649907323 is about 866.1979339269.

The spelling of 649907323 in words is "six hundred forty-nine million, nine hundred seven thousand, three hundred twenty-three".