204998957 has 2 divisors, whose sum is σ = 204998958. Its totient is φ = 204998956.

The previous prime is 204998953. The next prime is 204998987. The reversal of 204998957 is 759899402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148011556 + 56987401 = 12166^2 + 7549^2 .

It is a cyclic number.

It is not a de Polignac number, because 204998957 - 2² = 204998953 is a prime.

It is a super-3 number, since 3×204998957³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204998899 and 204998908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204998953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102499478 + 102499479.

It is an arithmetic number, because the mean of its divisors is an integer number (102499479).

Almost surely, 2^204998957 is an apocalyptic number.

It is an amenable number.

204998957 is a deficient number, since it is larger than the sum of its proper divisors (1).

204998957 is an equidigital number, since it uses as much as digits as its factorization.

204998957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 204998957 is about 14317.7846400901. The cubic root of 204998957 is about 589.6358540096.

The spelling of 204998957 in words is "two hundred four million, nine hundred ninety-eight thousand, nine hundred fifty-seven".