242420623 has 2 divisors, whose sum is σ = 242420624. Its totient is φ = 242420622.

The previous prime is 242420593. The next prime is 242420669. The reversal of 242420623 is 326024242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242420623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242420693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121210311 + 121210312.

It is an arithmetic number, because the mean of its divisors is an integer number (121210312).

Almost surely, 2^242420623 is an apocalyptic number.

242420623 is a deficient number, since it is larger than the sum of its proper divisors (1).

242420623 is an equidigital number, since it uses as much as digits as its factorization.

242420623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 242420623 is about 15569.8626519311. The cubic root of 242420623 is about 623.5288046119.

Adding to 242420623 its reverse (326024242), we get a palindrome (568444865).

The spelling of 242420623 in words is "two hundred forty-two million, four hundred twenty thousand, six hundred twenty-three".