2045819 has 2 divisors, whose sum is σ = 2045820. Its totient is φ = 2045818.

The previous prime is 2045789. The next prime is 2045833. The reversal of 2045819 is 9185402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2045819 - 2¹⁶ = 1980283 is a prime.

It is a super-2 number, since 2×2045819² = 8370750761522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2045791 and 2045800.

It is not a weakly prime, because it can be changed into another prime (2045839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022909 + 1022910.

It is an arithmetic number, because the mean of its divisors is an integer number (1022910).

2^2045819 is an apocalyptic number.

2045819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045819 is an equidigital number, since it uses as much as digits as its factorization.

2045819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2045819 is about 1430.3212925773. The cubic root of 2045819 is about 126.9469884360.

The spelling of 2045819 in words is "two million, forty-five thousand, eight hundred nineteen".