242943999 has 4 divisors (see below), whose sum is σ = 323925336. Its totient is φ = 161962664.

The previous prime is 242943977. The next prime is 242944001. The reversal of 242943999 is 999349242.

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 242943999 - 2¹² = 242939903 is a prime.

It is a super-2 number, since 2×242943999² = 118043573300224002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242943929) 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, 40490664 + ... + 40490669.

It is an arithmetic number, because the mean of its divisors is an integer number (80981334).

Almost surely, 2^242943999 is an apocalyptic number.

242943999 is a deficient number, since it is larger than the sum of its proper divisors (80981337).

242943999 is an equidigital number, since it uses as much as digits as its factorization.

242943999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80981336.

The product of its digits is 1259712, while the sum is 51.

The square root of 242943999 is about 15586.6609317070. The cubic root of 242943999 is about 623.9772062885.

The spelling of 242943999 in words is "two hundred forty-two million, nine hundred forty-three thousand, nine hundred ninety-nine".