203873840657 has 2 divisors, whose sum is σ = 203873840658. Its totient is φ = 203873840656.

The previous prime is 203873840623. The next prime is 203873840707. The reversal of 203873840657 is 756048378302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137456304001 + 66417536656 = 370751^2 + 257716^2 .

It is a cyclic number.

It is not a de Polignac number, because 203873840657 - 2¹⁰ = 203873839633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203873840599 and 203873840608.

It is not a weakly prime, because it can be changed into another prime (203873840617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101936920328 + 101936920329.

It is an arithmetic number, because the mean of its divisors is an integer number (101936920329).

Almost surely, 2^203873840657 is an apocalyptic number.

It is an amenable number.

203873840657 is a deficient number, since it is larger than the sum of its proper divisors (1).

203873840657 is an equidigital number, since it uses as much as digits as its factorization.

203873840657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 203873840657 in words is "two hundred three billion, eight hundred seventy-three million, eight hundred forty thousand, six hundred fifty-seven".