205097657 has 8 divisors (see below), whose sum is σ = 212984640. Its totient is φ = 197265040.

The previous prime is 205097593. The next prime is 205097671. The reversal of 205097657 is 756790502.

205097657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205097657 - 2⁶ = 205097593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205097857) 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, 5819 + ... + 21072.

It is an arithmetic number, because the mean of its divisors is an integer number (26623080).

Almost surely, 2^205097657 is an apocalyptic number.

It is an amenable number.

205097657 is a deficient number, since it is larger than the sum of its proper divisors (7886983).

205097657 is a wasteful number, since it uses less digits than its factorization.

205097657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27183.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 205097657 is about 14321.2309875932. The cubic root of 205097657 is about 589.7304686720.

The spelling of 205097657 in words is "two hundred five million, ninety-seven thousand, six hundred fifty-seven".