204997929 has 4 divisors (see below), whose sum is σ = 273330576. Its totient is φ = 136665284.

The previous prime is 204997927. The next prime is 204997931. The reversal of 204997929 is 929799402.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (204997927) and next prime (204997931).

It is a cyclic number.

It is not a de Polignac number, because 204997929 - 2¹ = 204997927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204997921) 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, 34166319 + ... + 34166324.

It is an arithmetic number, because the mean of its divisors is an integer number (68332644).

Almost surely, 2^204997929 is an apocalyptic number.

It is an amenable number.

204997929 is a deficient number, since it is larger than the sum of its proper divisors (68332647).

204997929 is an equidigital number, since it uses as much as digits as its factorization.

204997929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68332646.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 204997929 is about 14317.7487406366. The cubic root of 204997929 is about 589.6348684002.

The spelling of 204997929 in words is "two hundred four million, nine hundred ninety-seven thousand, nine hundred twenty-nine".