203430242387 has 2 divisors, whose sum is σ = 203430242388. Its totient is φ = 203430242386.

The previous prime is 203430242369. The next prime is 203430242503. The reversal of 203430242387 is 783242034302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203430242387 - 2²⁸ = 203161806931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203430242387.

It is not a weakly prime, because it can be changed into another prime (203430232387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101715121193 + 101715121194.

It is an arithmetic number, because the mean of its divisors is an integer number (101715121194).

Almost surely, 2^203430242387 is an apocalyptic number.

203430242387 is a deficient number, since it is larger than the sum of its proper divisors (1).

203430242387 is an equidigital number, since it uses as much as digits as its factorization.

203430242387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 38.

Adding to 203430242387 its reverse (783242034302), we get a palindrome (986672276689).

The spelling of 203430242387 in words is "two hundred three billion, four hundred thirty million, two hundred forty-two thousand, three hundred eighty-seven".