242064391 has 2 divisors, whose sum is σ = 242064392. Its totient is φ = 242064390.

The previous prime is 242064353. The next prime is 242064439. The reversal of 242064391 is 193460242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242064391 - 2¹¹ = 242062343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242064301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121032195 + 121032196.

It is an arithmetic number, because the mean of its divisors is an integer number (121032196).

Almost surely, 2^242064391 is an apocalyptic number.

242064391 is a deficient number, since it is larger than the sum of its proper divisors (1).

242064391 is an equidigital number, since it uses as much as digits as its factorization.

242064391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 242064391 is about 15558.4186535779. The cubic root of 242064391 is about 623.2232340709.

The spelling of 242064391 in words is "two hundred forty-two million, sixty-four thousand, three hundred ninety-one".