243920073 has 8 divisors (see below), whose sum is σ = 336441600. Its totient is φ = 157005968.

The previous prime is 243920069. The next prime is 243920077. The reversal of 243920073 is 370029342.

It is an interprime number because it is at equal distance from previous prime (243920069) and next prime (243920077).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243920073 - 2² = 243920069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243920073.

It is not an unprimeable number, because it can be changed into a prime (243920077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401753 + ... + 1401926.

It is an arithmetic number, because the mean of its divisors is an integer number (42055200).

Almost surely, 2^243920073 is an apocalyptic number.

It is an amenable number.

243920073 is a deficient number, since it is larger than the sum of its proper divisors (92521527).

243920073 is a wasteful number, since it uses less digits than its factorization.

243920073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803711.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 243920073 is about 15617.9407413397. The cubic root of 243920073 is about 624.8117389248.

The spelling of 243920073 in words is "two hundred forty-three million, nine hundred twenty thousand, seventy-three".