205604601 has 4 divisors (see below), whose sum is σ = 274139472. Its totient is φ = 137069732.

The previous prime is 205604551. The next prime is 205604621. The reversal of 205604601 is 106406502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205604601 - 2⁷ = 205604473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205604621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34267431 + ... + 34267436.

It is an arithmetic number, because the mean of its divisors is an integer number (68534868).

Almost surely, 2^205604601 is an apocalyptic number.

It is an amenable number.

205604601 is a deficient number, since it is larger than the sum of its proper divisors (68534871).

205604601 is an equidigital number, since it uses as much as digits as its factorization.

205604601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68534870.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 205604601 is about 14338.9191015223. The cubic root of 205604601 is about 590.2159517817.

The spelling of 205604601 in words is "two hundred five million, six hundred four thousand, six hundred one".