203441640697 has 2 divisors, whose sum is σ = 203441640698. Its totient is φ = 203441640696.

The previous prime is 203441640683. The next prime is 203441640761. The reversal of 203441640697 is 796046144302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202071826576 + 1369814121 = 449524^2 + 37011^2 .

It is a cyclic number.

It is not a de Polignac number, because 203441640697 - 2²³ = 203433252089 is a prime.

It is not a weakly prime, because it can be changed into another prime (203441640607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101720820348 + 101720820349.

It is an arithmetic number, because the mean of its divisors is an integer number (101720820349).

Almost surely, 2^203441640697 is an apocalyptic number.

It is an amenable number.

203441640697 is a deficient number, since it is larger than the sum of its proper divisors (1).

203441640697 is an equidigital number, since it uses as much as digits as its factorization.

203441640697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 46.

Adding to 203441640697 its reverse (796046144302), we get a palindrome (999487784999).

The spelling of 203441640697 in words is "two hundred three billion, four hundred forty-one million, six hundred forty thousand, six hundred ninety-seven".