205473743 has 4 divisors (see below), whose sum is σ = 214407408. Its totient is φ = 196540080.

The previous prime is 205473727. The next prime is 205473799. The reversal of 205473743 is 347374502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 347374502 = 2 ⋅173687251.

It is a cyclic number.

It is not a de Polignac number, because 205473743 - 2⁴ = 205473727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205473343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4466798 + ... + 4466843.

It is an arithmetic number, because the mean of its divisors is an integer number (53601852).

Almost surely, 2^205473743 is an apocalyptic number.

205473743 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

205473743 is a deficient number, since it is larger than the sum of its proper divisors (8933665).

205473743 is an equidigital number, since it uses as much as digits as its factorization.

205473743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8933664.

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 205473743 is about 14334.3553395331. The cubic root of 205473743 is about 590.0907099829.

The spelling of 205473743 in words is "two hundred five million, four hundred seventy-three thousand, seven hundred forty-three".