205238392049 has 2 divisors, whose sum is σ = 205238392050. Its totient is φ = 205238392048.

The previous prime is 205238392043. The next prime is 205238392067. The reversal of 205238392049 is 940293832502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197064966400 + 8173425649 = 443920^2 + 90407^2 .

It is a cyclic number.

It is not a de Polignac number, because 205238392049 - 2²⁸ = 204969956593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205238391994 and 205238392012.

It is not a weakly prime, because it can be changed into another prime (205238392043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102619196024 + 102619196025.

It is an arithmetic number, because the mean of its divisors is an integer number (102619196025).

Almost surely, 2^205238392049 is an apocalyptic number.

It is an amenable number.

205238392049 is a deficient number, since it is larger than the sum of its proper divisors (1).

205238392049 is an equidigital number, since it uses as much as digits as its factorization.

205238392049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 205238392049 in words is "two hundred five billion, two hundred thirty-eight million, three hundred ninety-two thousand, forty-nine".