204680513 has 2 divisors, whose sum is σ = 204680514. Its totient is φ = 204680512.

The previous prime is 204680491. The next prime is 204680537. The reversal of 204680513 is 315086402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173633329 + 31047184 = 13177^2 + 5572^2 .

It is a cyclic number.

It is not a de Polignac number, because 204680513 - 2¹⁴ = 204664129 is a prime.

It is a super-2 number, since 2×204680513² = 83788224803886338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204680543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102340256 + 102340257.

It is an arithmetic number, because the mean of its divisors is an integer number (102340257).

Almost surely, 2^204680513 is an apocalyptic number.

It is an amenable number.

204680513 is a deficient number, since it is larger than the sum of its proper divisors (1).

204680513 is an equidigital number, since it uses as much as digits as its factorization.

204680513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 204680513 is about 14306.6597429309. The cubic root of 204680513 is about 589.3303836608.

The spelling of 204680513 in words is "two hundred four million, six hundred eighty thousand, five hundred thirteen".