204457457 has 2 divisors, whose sum is σ = 204457458. Its totient is φ = 204457456.

The previous prime is 204457417. The next prime is 204457481. The reversal of 204457457 is 754754402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128958736 + 75498721 = 11356^2 + 8689^2 .

It is a cyclic number.

It is not a de Polignac number, because 204457457 - 2¹⁶ = 204391921 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204457457.

It is not a weakly prime, because it can be changed into another prime (204457417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102228728 + 102228729.

It is an arithmetic number, because the mean of its divisors is an integer number (102228729).

Almost surely, 2^204457457 is an apocalyptic number.

It is an amenable number.

204457457 is a deficient number, since it is larger than the sum of its proper divisors (1).

204457457 is an equidigital number, since it uses as much as digits as its factorization.

204457457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156800, while the sum is 38.

The square root of 204457457 is about 14298.8620875928. The cubic root of 204457457 is about 589.1162263923.

The spelling of 204457457 in words is "two hundred four million, four hundred fifty-seven thousand, four hundred fifty-seven".