2605819 has 2 divisors, whose sum is σ = 2605820. Its totient is φ = 2605818.

The previous prime is 2605787. The next prime is 2605847. The reversal of 2605819 is 9185062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2605819 - 2⁵ = 2605787 is a prime.

It is a super-2 number, since 2×2605819² = 13580585321522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2605849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302909 + 1302910.

It is an arithmetic number, because the mean of its divisors is an integer number (1302910).

2^2605819 is an apocalyptic number.

2605819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605819 is an equidigital number, since it uses as much as digits as its factorization.

2605819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2605819 is about 1614.2549364955. The cubic root of 2605819 is about 137.6093939357.

The spelling of 2605819 in words is "two million, six hundred five thousand, eight hundred nineteen".