405089 has 2 divisors, whose sum is σ = 405090. Its totient is φ = 405088.

The previous prime is 405073. The next prime is 405091. The reversal of 405089 is 980504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270400 + 134689 = 520^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 405089 - 2⁴ = 405073 is a prime.

Together with 405091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202544 + 202545.

It is an arithmetic number, because the mean of its divisors is an integer number (202545).

2⁴⁰⁵⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

405089 is a deficient number, since it is larger than the sum of its proper divisors (1).

405089 is an equidigital number, since it uses as much as digits as its factorization.

405089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 405089 is about 636.4660242307. The cubic root of 405089 is about 73.9917814101.

The spelling of 405089 in words is "four hundred five thousand, eighty-nine".