242391903899 has 4 divisors (see below), whose sum is σ = 242410146264. Its totient is φ = 242373661536.

The previous prime is 242391903857. The next prime is 242391903917. The reversal of 242391903899 is 998309193242.

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 242391903899 - 2⁸ = 242391903643 is a prime.

It is a super-4 number, since 4×242391903899⁴ (a number of 47 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242391903829) 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, 9101237 + ... + 9127830.

It is an arithmetic number, because the mean of its divisors is an integer number (60602536566).

Almost surely, 2^242391903899 is an apocalyptic number.

242391903899 is a deficient number, since it is larger than the sum of its proper divisors (18242365).

242391903899 is a wasteful number, since it uses less digits than its factorization.

242391903899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18242364.

The product of its (nonzero) digits is 7558272, while the sum is 59.

The spelling of 242391903899 in words is "two hundred forty-two billion, three hundred ninety-one million, nine hundred three thousand, eight hundred ninety-nine".