243707873 has 2 divisors, whose sum is σ = 243707874. Its totient is φ = 243707872.

The previous prime is 243707857. The next prime is 243707897. The reversal of 243707873 is 378707342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146724769 + 96983104 = 12113^2 + 9848^2 .

It is a cyclic number.

It is not a de Polignac number, because 243707873 - 2⁴ = 243707857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243707873.

It is not a weakly prime, because it can be changed into another prime (243707843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121853936 + 121853937.

It is an arithmetic number, because the mean of its divisors is an integer number (121853937).

Almost surely, 2^243707873 is an apocalyptic number.

It is an amenable number.

243707873 is a deficient number, since it is larger than the sum of its proper divisors (1).

243707873 is an equidigital number, since it uses as much as digits as its factorization.

243707873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 243707873 is about 15611.1457939512. The cubic root of 243707873 is about 624.6304998878.

The spelling of 243707873 in words is "two hundred forty-three million, seven hundred seven thousand, eight hundred seventy-three".