204470691 has 4 divisors (see below), whose sum is σ = 272627592. Its totient is φ = 136313792.

The previous prime is 204470681. The next prime is 204470711. The reversal of 204470691 is 196074402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204470691 - 2⁵ = 204470659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204470641) 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 3 ways as a sum of consecutive naturals, for example, 34078446 + ... + 34078451.

It is an arithmetic number, because the mean of its divisors is an integer number (68156898).

Almost surely, 2^204470691 is an apocalyptic number.

204470691 is a deficient number, since it is larger than the sum of its proper divisors (68156901).

204470691 is an equidigital number, since it uses as much as digits as its factorization.

204470691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68156900.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 204470691 is about 14299.3248442016. The cubic root of 204470691 is about 589.1289367724.

The spelling of 204470691 in words is "two hundred four million, four hundred seventy thousand, six hundred ninety-one".