205053389 has 2 divisors, whose sum is σ = 205053390. Its totient is φ = 205053388.

The previous prime is 205053323. The next prime is 205053421. The reversal of 205053389 is 983350502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188512900 + 16540489 = 13730^2 + 4067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205053389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205053689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102526694 + 102526695.

It is an arithmetic number, because the mean of its divisors is an integer number (102526695).

Almost surely, 2^205053389 is an apocalyptic number.

It is an amenable number.

205053389 is a deficient number, since it is larger than the sum of its proper divisors (1).

205053389 is an equidigital number, since it uses as much as digits as its factorization.

205053389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 205053389 is about 14319.6853666552. The cubic root of 205053389 is about 589.6880367443.

The spelling of 205053389 in words is "two hundred five million, fifty-three thousand, three hundred eighty-nine".