243650913 has 16 divisors (see below), whose sum is σ = 359396352. Its totient is φ = 145586000.

The previous prime is 243650903. The next prime is 243650959. The reversal of 243650913 is 319056342.

It is a cyclic number.

It is not a de Polignac number, because 243650913 - 2⁵ = 243650881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (243650903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49653 + ... + 54338.

It is an arithmetic number, because the mean of its divisors is an integer number (22462272).

Almost surely, 2^243650913 is an apocalyptic number.

It is an amenable number.

243650913 is a deficient number, since it is larger than the sum of its proper divisors (115745439).

243650913 is a wasteful number, since it uses less digits than its factorization.

243650913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104076.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 243650913 is about 15609.3213497577. The cubic root of 243650913 is about 624.5818327068.

It can be divided in two parts, 243 and 650913, that added together give a palindrome (651156).

The spelling of 243650913 in words is "two hundred forty-three million, six hundred fifty thousand, nine hundred thirteen".