205474091 has 4 divisors (see below), whose sum is σ = 205549800. Its totient is φ = 205398384.

The previous prime is 205474063. The next prime is 205474103. The reversal of 205474091 is 190474502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190474502 = 2 ⋅95237251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205474091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205474691) 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, 33626 + ... + 39263.

It is an arithmetic number, because the mean of its divisors is an integer number (51387450).

Almost surely, 2^205474091 is an apocalyptic number.

205474091 is a deficient number, since it is larger than the sum of its proper divisors (75709).

205474091 is an equidigital number, since it uses as much as digits as its factorization.

205474091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75708.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 205474091 is about 14334.3674781973. The cubic root of 205474091 is about 590.0910431179.

The spelling of 205474091 in words is "two hundred five million, four hundred seventy-four thousand, ninety-one".