204697861 has 8 divisors (see below), whose sum is σ = 213814080. Its totient is φ = 195599712.

The previous prime is 204697859. The next prime is 204697877. The reversal of 204697861 is 168796402.

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 204697861 - 2¹ = 204697859 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 (204697891) 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, 22026 + ... + 29908.

It is an arithmetic number, because the mean of its divisors is an integer number (26726760).

Almost surely, 2^204697861 is an apocalyptic number.

It is an amenable number.

204697861 is a deficient number, since it is larger than the sum of its proper divisors (9116219).

204697861 is a wasteful number, since it uses less digits than its factorization.

204697861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 204697861 is about 14307.2660211516. The cubic root of 204697861 is about 589.3470330469.

The spelling of 204697861 in words is "two hundred four million, six hundred ninety-seven thousand, eight hundred sixty-one".