418889 has 2 divisors, whose sum is σ = 418890. Its totient is φ = 418888.

The previous prime is 418883. The next prime is 418909. The reversal of 418889 is 988814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265225 + 153664 = 515^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 418889 - 2⁸ = 418633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (418883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209444 + 209445.

It is an arithmetic number, because the mean of its divisors is an integer number (209445).

2⁴¹⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

418889 is a deficient number, since it is larger than the sum of its proper divisors (1).

418889 is an equidigital number, since it uses as much as digits as its factorization.

418889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 38.

The square root of 418889 is about 647.2163471359. The cubic root of 418889 is about 74.8226327272.

The spelling of 418889 in words is "four hundred eighteen thousand, eight hundred eighty-nine".