242642399 has 2 divisors, whose sum is σ = 242642400. Its totient is φ = 242642398.

The previous prime is 242642371. The next prime is 242642423. The reversal of 242642399 is 993246242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242642399 - 2⁸ = 242642143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242642329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121321199 + 121321200.

It is an arithmetic number, because the mean of its divisors is an integer number (121321200).

Almost surely, 2^242642399 is an apocalyptic number.

242642399 is a deficient number, since it is larger than the sum of its proper divisors (1).

242642399 is an equidigital number, since it uses as much as digits as its factorization.

242642399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 242642399 is about 15576.9829877290. The cubic root of 242642399 is about 623.7188896175.

The spelling of 242642399 in words is "two hundred forty-two million, six hundred forty-two thousand, three hundred ninety-nine".