242409899 has 2 divisors, whose sum is σ = 242409900. Its totient is φ = 242409898.

The previous prime is 242409823. The next prime is 242409907. The reversal of 242409899 is 998904242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242409899 - 2¹² = 242405803 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242402899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121204949 + 121204950.

It is an arithmetic number, because the mean of its divisors is an integer number (121204950).

Almost surely, 2^242409899 is an apocalyptic number.

242409899 is a deficient number, since it is larger than the sum of its proper divisors (1).

242409899 is an equidigital number, since it uses as much as digits as its factorization.

242409899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 242409899 is about 15569.5182648661. The cubic root of 242409899 is about 623.5196100950.

The spelling of 242409899 in words is "two hundred forty-two million, four hundred nine thousand, eight hundred ninety-nine".