2088409 has 2 divisors, whose sum is σ = 2088410. Its totient is φ = 2088408.

The previous prime is 2088407. The next prime is 2088413. The reversal of 2088409 is 9048802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1570009 + 518400 = 1253^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 2088409 - 2¹ = 2088407 is a prime.

It is a super-2 number, since 2×2088409² = 8722904302562, which contains 22 as substring.

Together with 2088407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2088403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1044204 + 1044205.

It is an arithmetic number, because the mean of its divisors is an integer number (1044205).

2^2088409 is an apocalyptic number.

It is an amenable number.

2088409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2088409 is an equidigital number, since it uses as much as digits as its factorization.

2088409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2088409 is about 1445.1328658639. The cubic root of 2088409 is about 127.8218754468.

It can be divided in two parts, 208840 and 9, that added together give a square (208849 = 457²).

The spelling of 2088409 in words is "two million, eighty-eight thousand, four hundred nine".