204453643 has 2 divisors, whose sum is σ = 204453644. Its totient is φ = 204453642.

The previous prime is 204453637. The next prime is 204453653. The reversal of 204453643 is 346354402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204453643 is a prime.

It is not a weakly prime, because it can be changed into another prime (204453653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102226821 + 102226822.

It is an arithmetic number, because the mean of its divisors is an integer number (102226822).

Almost surely, 2^204453643 is an apocalyptic number.

204453643 is a deficient number, since it is larger than the sum of its proper divisors (1).

204453643 is an equidigital number, since it uses as much as digits as its factorization.

204453643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 204453643 is about 14298.7287197149. The cubic root of 204453643 is about 589.1125631963.

The spelling of 204453643 in words is "two hundred four million, four hundred fifty-three thousand, six hundred forty-three".