204979847 has 8 divisors (see below), whose sum is σ = 215900160. Its totient is φ = 194072760.

The previous prime is 204979807. The next prime is 204979877. The reversal of 204979847 is 748979402.

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 204979847 - 2⁶ = 204979783 is a prime.

It is a super-2 number, since 2×204979847² = 84033475352286818, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204979795 and 204979804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204979807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55418 + ... + 59000.

It is an arithmetic number, because the mean of its divisors is an integer number (26987520).

Almost surely, 2^204979847 is an apocalyptic number.

204979847 is a deficient number, since it is larger than the sum of its proper divisors (10920313).

204979847 is a wasteful number, since it uses less digits than its factorization.

204979847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 204979847 is about 14317.1172726915. The cubic root of 204979847 is about 589.6175314915.

The spelling of 204979847 in words is "two hundred four million, nine hundred seventy-nine thousand, eight hundred forty-seven".