204021089 has 2 divisors, whose sum is σ = 204021090. Its totient is φ = 204021088.

The previous prime is 204021067. The next prime is 204021101. The reversal of 204021089 is 980120402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201412864 + 2608225 = 14192^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 204021089 - 2¹² = 204016993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204021049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010544 + 102010545.

It is an arithmetic number, because the mean of its divisors is an integer number (102010545).

Almost surely, 2^204021089 is an apocalyptic number.

It is an amenable number.

204021089 is a deficient number, since it is larger than the sum of its proper divisors (1).

204021089 is an equidigital number, since it uses as much as digits as its factorization.

204021089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 204021089 is about 14283.5951006741. The cubic root of 204021089 is about 588.6968162825.

The spelling of 204021089 in words is "two hundred four million, twenty-one thousand, eighty-nine".