2163919 has 2 divisors, whose sum is σ = 2163920. Its totient is φ = 2163918.

The previous prime is 2163911. The next prime is 2163923. The reversal of 2163919 is 9193612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2163919 - 2³ = 2163911 is a prime.

It is a super-2 number, since 2×2163919² = 9365090877122, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2163911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081959 + 1081960.

It is an arithmetic number, because the mean of its divisors is an integer number (1081960).

2^2163919 is an apocalyptic number.

2163919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163919 is an equidigital number, since it uses as much as digits as its factorization.

2163919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 31.

The square root of 2163919 is about 1471.0265123376. The cubic root of 2163919 is about 129.3442122201.

The spelling of 2163919 in words is "two million, one hundred sixty-three thousand, nine hundred nineteen".