888409 has 2 divisors, whose sum is σ = 888410. Its totient is φ = 888408.

The previous prime is 888397. The next prime is 888413. The reversal of 888409 is 904888.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 27225 = 928^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 888409 - 2¹⁵ = 855641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (888469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444204 + 444205.

It is an arithmetic number, because the mean of its divisors is an integer number (444205).

2⁸⁸⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

888409 is a deficient number, since it is larger than the sum of its proper divisors (1).

888409 is an equidigital number, since it uses as much as digits as its factorization.

888409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 888409 is about 942.5545077076. The cubic root of 888409 is about 96.1326652505.

The spelling of 888409 in words is "eight hundred eighty-eight thousand, four hundred nine".