242991718 has 4 divisors (see below), whose sum is σ = 364487580. Its totient is φ = 121495858.

The previous prime is 242991643. The next prime is 242991719. The reversal of 242991718 is 817199242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242991719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60747928 + ... + 60747931.

It is an arithmetic number, because the mean of its divisors is an integer number (91121895).

Almost surely, 2^242991718 is an apocalyptic number.

242991718 is a deficient number, since it is larger than the sum of its proper divisors (121495862).

242991718 is a wasteful number, since it uses less digits than its factorization.

242991718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121495861.

The product of its digits is 72576, while the sum is 43.

The square root of 242991718 is about 15588.1916205825. The cubic root of 242991718 is about 624.0180574300.

The spelling of 242991718 in words is "two hundred forty-two million, nine hundred ninety-one thousand, seven hundred eighteen".