205399741 has 2 divisors, whose sum is σ = 205399742. Its totient is φ = 205399740.

The previous prime is 205399717. The next prime is 205399783. The reversal of 205399741 is 147993502.

Added to its reverse (147993502) it gives a cube (353393243 = 707³).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123876900 + 81522841 = 11130^2 + 9029^2 .

It is a cyclic number.

It is not a de Polignac number, because 205399741 - 2¹⁹ = 204875453 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205399694 and 205399703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205499741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102699870 + 102699871.

It is an arithmetic number, because the mean of its divisors is an integer number (102699871).

Almost surely, 2^205399741 is an apocalyptic number.

It is an amenable number.

205399741 is a deficient number, since it is larger than the sum of its proper divisors (1).

205399741 is an equidigital number, since it uses as much as digits as its factorization.

205399741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 205399741 is about 14331.7738260133. The cubic root of 205399741 is about 590.0198604825.

Adding to 205399741 its reverse (147993502), we get a cube (353393243 = 707³).

The spelling of 205399741 in words is "two hundred five million, three hundred ninety-nine thousand, seven hundred forty-one".