243990707 has 2 divisors, whose sum is σ = 243990708. Its totient is φ = 243990706.

The previous prime is 243990697. The next prime is 243990727. The reversal of 243990707 is 707099342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243990707 - 2¹⁴ = 243974323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243990727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121995353 + 121995354.

It is an arithmetic number, because the mean of its divisors is an integer number (121995354).

Almost surely, 2^243990707 is an apocalyptic number.

243990707 is a deficient number, since it is larger than the sum of its proper divisors (1).

243990707 is an equidigital number, since it uses as much as digits as its factorization.

243990707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 243990707 is about 15620.2018872997. The cubic root of 243990707 is about 624.8720437786.

The spelling of 243990707 in words is "two hundred forty-three million, nine hundred ninety thousand, seven hundred seven".