203197941279161 has 2 divisors, whose sum is σ = 203197941279162. Its totient is φ = 203197941279160.

The previous prime is 203197941279149. The next prime is 203197941279167. The reversal of 203197941279161 is 161972149791302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114723807246400 + 88474134032761 = 10710920^2 + 9406069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203197941279161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203197941279094 and 203197941279103.

It is not a weakly prime, because it can be changed into another prime (203197941279167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101598970639580 + 101598970639581.

It is an arithmetic number, because the mean of its divisors is an integer number (101598970639581).

Almost surely, 2^{203197941279161} is an apocalyptic number.

It is an amenable number.

203197941279161 is a deficient number, since it is larger than the sum of its proper divisors (1).

203197941279161 is an equidigital number, since it uses as much as digits as its factorization.

203197941279161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The spelling of 203197941279161 in words is "two hundred three trillion, one hundred ninety-seven billion, nine hundred forty-one million, two hundred seventy-nine thousand, one hundred sixty-one".