2001919 has 2 divisors, whose sum is σ = 2001920. Its totient is φ = 2001918.

The previous prime is 2001911. The next prime is 2001953. The reversal of 2001919 is 9191002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001919 - 2³ = 2001911 is a prime.

It is a super-2 number, since 2×2001919² = 8015359365122, which contains 22 as substring.

2001919 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000959 + 1000960.

It is an arithmetic number, because the mean of its divisors is an integer number (1000960).

2^2001919 is an apocalyptic number.

2001919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001919 is an equidigital number, since it uses as much as digits as its factorization.

2001919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 2001919 is about 1414.8918686599. The cubic root of 2001919 is about 126.0323885831.

The spelling of 2001919 in words is "two million, one thousand, nine hundred nineteen".