205638097 has 8 divisors (see below), whose sum is σ = 242596352. Its totient is φ = 170575200.

The previous prime is 205638071. The next prime is 205638131. The reversal of 205638097 is 790836502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205638097 - 2¹⁵ = 205605329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205638047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473604 + ... + 474037.

It is an arithmetic number, because the mean of its divisors is an integer number (30324544).

Almost surely, 2^205638097 is an apocalyptic number.

It is an amenable number.

205638097 is a deficient number, since it is larger than the sum of its proper divisors (36958255).

205638097 is an equidigital number, since it uses as much as digits as its factorization.

205638097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947679.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 205638097 is about 14340.0870638919. The cubic root of 205638097 is about 590.2480016482.

The spelling of 205638097 in words is "two hundred five million, six hundred thirty-eight thousand, ninety-seven".