204971001 has 4 divisors (see below), whose sum is σ = 273294672. Its totient is φ = 136647332.

The previous prime is 204970979. The next prime is 204971017. The reversal of 204971001 is 100179402.

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 204971001 - 2¹⁰ = 204969977 is a prime.

It is a super-2 number, since 2×204971001² = 84026222501884002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204971071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34161831 + ... + 34161836.

It is an arithmetic number, because the mean of its divisors is an integer number (68323668).

Almost surely, 2^204971001 is an apocalyptic number.

It is an amenable number.

204971001 is a deficient number, since it is larger than the sum of its proper divisors (68323671).

204971001 is an equidigital number, since it uses as much as digits as its factorization.

204971001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68323670.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 204971001 is about 14316.8083384531. The cubic root of 204971001 is about 589.6090496304.

The spelling of 204971001 in words is "two hundred four million, nine hundred seventy-one thousand, one".