205471393 has 2 divisors, whose sum is σ = 205471394. Its totient is φ = 205471392.

The previous prime is 205471369. The next prime is 205471423. The reversal of 205471393 is 393174502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159340129 + 46131264 = 12623^2 + 6792^2 .

It is a cyclic number.

It is not a de Polignac number, because 205471393 - 2²⁵ = 171916961 is a prime.

It is not a weakly prime, because it can be changed into another prime (200471393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102735696 + 102735697.

It is an arithmetic number, because the mean of its divisors is an integer number (102735697).

Almost surely, 2^205471393 is an apocalyptic number.

It is an amenable number.

205471393 is a deficient number, since it is larger than the sum of its proper divisors (1).

205471393 is an equidigital number, since it uses as much as digits as its factorization.

205471393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 205471393 is about 14334.2733683993. The cubic root of 205471393 is about 590.0884603549.

The spelling of 205471393 in words is "two hundred five million, four hundred seventy-one thousand, three hundred ninety-three".