242709813 has 12 divisors (see below), whose sum is σ = 351917280. Its totient is φ = 161189736.

The previous prime is 242709769. The next prime is 242709821. The reversal of 242709813 is 318907242.

It is not a de Polignac number, because 242709813 - 2²¹ = 240612661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242709913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48903 + ... + 53636.

It is an arithmetic number, because the mean of its divisors is an integer number (29326440).

Almost surely, 2^242709813 is an apocalyptic number.

It is an amenable number.

242709813 is a deficient number, since it is larger than the sum of its proper divisors (109207467).

242709813 is a wasteful number, since it uses less digits than its factorization.

242709813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102808 (or 102805 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 242709813 is about 15579.1467352997. The cubic root of 242709813 is about 623.7766474426.

The spelling of 242709813 in words is "two hundred forty-two million, seven hundred nine thousand, eight hundred thirteen".