2120819 has 2 divisors, whose sum is σ = 2120820. Its totient is φ = 2120818.

The previous prime is 2120779. The next prime is 2120827. The reversal of 2120819 is 9180212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120819 is a prime.

It is a super-2 number, since 2×2120819² = 8995746461522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120794 and 2120803.

It is not a weakly prime, because it can be changed into another prime (2120849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060409 + 1060410.

It is an arithmetic number, because the mean of its divisors is an integer number (1060410).

2^2120819 is an apocalyptic number.

2120819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120819 is an equidigital number, since it uses as much as digits as its factorization.

2120819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2120819 is about 1456.3031964533. The cubic root of 2120819 is about 128.4797063038.

The spelling of 2120819 in words is "two million, one hundred twenty thousand, eight hundred nineteen".