2106919 has 2 divisors, whose sum is σ = 2106920. Its totient is φ = 2106918.

The previous prime is 2106917. The next prime is 2106931. The reversal of 2106919 is 9196012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2106919 - 2¹ = 2106917 is a prime.

It is a super-2 number, since 2×2106919² = 8878215345122, which contains 22 as substring.

Together with 2106917, it forms a pair of twin primes.

2106919 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2106911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053459 + 1053460.

It is an arithmetic number, because the mean of its divisors is an integer number (1053460).

2^2106919 is an apocalyptic number.

2106919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106919 is an equidigital number, since it uses as much as digits as its factorization.

2106919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 2106919 is about 1451.5229932729. The cubic root of 2106919 is about 128.1984024373.

It can be divided in two parts, 2106 and 919, that added together give a square (3025 = 55²).

The spelling of 2106919 in words is "two million, one hundred six thousand, nine hundred nineteen".