203442440387 has 2 divisors, whose sum is σ = 203442440388. Its totient is φ = 203442440386.

The previous prime is 203442440347. The next prime is 203442440417. The reversal of 203442440387 is 783044244302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203442440387 - 2²² = 203438246083 is a prime.

It is not a weakly prime, because it can be changed into another prime (203442440317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101721220193 + 101721220194.

It is an arithmetic number, because the mean of its divisors is an integer number (101721220194).

Almost surely, 2^203442440387 is an apocalyptic number.

203442440387 is a deficient number, since it is larger than the sum of its proper divisors (1).

203442440387 is an equidigital number, since it uses as much as digits as its factorization.

203442440387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 41.

Adding to 203442440387 its reverse (783044244302), we get a palindrome (986486684689).

The spelling of 203442440387 in words is "two hundred three billion, four hundred forty-two million, four hundred forty thousand, three hundred eighty-seven".