205740923 has 2 divisors, whose sum is σ = 205740924. Its totient is φ = 205740922.

The previous prime is 205740881. The next prime is 205740929. The reversal of 205740923 is 329047502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205740923 - 2²⁴ = 188963707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205740923.

It is not a weakly prime, because it can be changed into another prime (205740929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102870461 + 102870462.

It is an arithmetic number, because the mean of its divisors is an integer number (102870462).

Almost surely, 2^205740923 is an apocalyptic number.

205740923 is a deficient number, since it is larger than the sum of its proper divisors (1).

205740923 is an equidigital number, since it uses as much as digits as its factorization.

205740923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 205740923 is about 14343.6718799616. The cubic root of 205740923 is about 590.3463665727.

The spelling of 205740923 in words is "two hundred five million, seven hundred forty thousand, nine hundred twenty-three".