203404000057 has 2 divisors, whose sum is σ = 203404000058. Its totient is φ = 203404000056.

The previous prime is 203404000039. The next prime is 203404000061. The reversal of 203404000057 is 750000404302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112428772416 + 90975227641 = 335304^2 + 301621^2 .

It is a cyclic number.

It is not a de Polignac number, because 203404000057 - 2²³ = 203395611449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203403999995 and 203404000040.

It is not a weakly prime, because it can be changed into another prime (203404000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101702000028 + 101702000029.

It is an arithmetic number, because the mean of its divisors is an integer number (101702000029).

Almost surely, 2^203404000057 is an apocalyptic number.

It is an amenable number.

203404000057 is a deficient number, since it is larger than the sum of its proper divisors (1).

203404000057 is an equidigital number, since it uses as much as digits as its factorization.

203404000057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

Adding to 203404000057 its reverse (750000404302), we get a palindrome (953404404359).

The spelling of 203404000057 in words is "two hundred three billion, four hundred four million, fifty-seven", and thus it is an aban number.