2109671 has 2 divisors, whose sum is σ = 2109672. Its totient is φ = 2109670.

The previous prime is 2109647. The next prime is 2109697. The reversal of 2109671 is 1769012.

It is an a-pointer prime, because the next prime (2109697) can be obtained adding 2109671 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2109671 - 2⁶ = 2109607 is a prime.

It is a Chen prime.

It is equal to p₁₅₆₄₈₂ and since 2109671 and 156482 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2109671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2109641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054835 + 1054836.

It is an arithmetic number, because the mean of its divisors is an integer number (1054836).

2^2109671 is an apocalyptic number.

2109671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109671 is an equidigital number, since it uses as much as digits as its factorization.

2109671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2109671 is about 1452.4706537483. The cubic root of 2109671 is about 128.2541945691.

The spelling of 2109671 in words is "two million, one hundred nine thousand, six hundred seventy-one".