2608409 has 2 divisors, whose sum is σ = 2608410. Its totient is φ = 2608408.

The previous prime is 2608393. The next prime is 2608439. The reversal of 2608409 is 9048062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1968409 + 640000 = 1403^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2608409 - 2⁴ = 2608393 is a prime.

It is a super-2 number, since 2×2608409² = 13607595022562, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (2608439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304204 + 1304205.

It is an arithmetic number, because the mean of its divisors is an integer number (1304205).

2^2608409 is an apocalyptic number.

It is an amenable number.

2608409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2608409 is an equidigital number, since it uses as much as digits as its factorization.

2608409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2608409 is about 1615.0569649396. The cubic root of 2608409 is about 137.6549701779.

The spelling of 2608409 in words is "two million, six hundred eight thousand, four hundred nine".