242889403 has 2 divisors, whose sum is σ = 242889404. Its totient is φ = 242889402.

The previous prime is 242889391. The next prime is 242889461. The reversal of 242889403 is 304988242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242889403 is a prime.

It is not a weakly prime, because it can be changed into another prime (242889463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121444701 + 121444702.

It is an arithmetic number, because the mean of its divisors is an integer number (121444702).

Almost surely, 2^242889403 is an apocalyptic number.

242889403 is a deficient number, since it is larger than the sum of its proper divisors (1).

242889403 is an equidigital number, since it uses as much as digits as its factorization.

242889403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 242889403 is about 15584.9094639655. The cubic root of 242889403 is about 623.9304613433.

The spelling of 242889403 in words is "two hundred forty-two million, eight hundred eighty-nine thousand, four hundred three".