203442439393 has 2 divisors, whose sum is σ = 203442439394. Its totient is φ = 203442439392.

The previous prime is 203442439379. The next prime is 203442439477. The reversal of 203442439393 is 393934244302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138303659664 + 65138779729 = 371892^2 + 255223^2 .

It is a cyclic number.

It is not a de Polignac number, because 203442439393 - 2²¹ = 203440342241 is a prime.

It is a super-2 number, since 2×203442439393² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203442439313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101721219696 + 101721219697.

It is an arithmetic number, because the mean of its divisors is an integer number (101721219697).

Almost surely, 2^203442439393 is an apocalyptic number.

It is an amenable number.

203442439393 is a deficient number, since it is larger than the sum of its proper divisors (1).

203442439393 is an equidigital number, since it uses as much as digits as its factorization.

203442439393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 46.

The spelling of 203442439393 in words is "two hundred three billion, four hundred forty-two million, four hundred thirty-nine thousand, three hundred ninety-three".