205394797 has 2 divisors, whose sum is σ = 205394798. Its totient is φ = 205394796.

The previous prime is 205394773. The next prime is 205394801. The reversal of 205394797 is 797493502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131537961 + 73856836 = 11469^2 + 8594^2 .

It is a cyclic number.

It is not a de Polignac number, because 205394797 - 2¹¹ = 205392749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205394737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102697398 + 102697399.

It is an arithmetic number, because the mean of its divisors is an integer number (102697399).

Almost surely, 2^205394797 is an apocalyptic number.

It is an amenable number.

205394797 is a deficient number, since it is larger than the sum of its proper divisors (1).

205394797 is an equidigital number, since it uses as much as digits as its factorization.

205394797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 205394797 is about 14331.6013410923. The cubic root of 205394797 is about 590.0151264914.

The spelling of 205394797 in words is "two hundred five million, three hundred ninety-four thousand, seven hundred ninety-seven".