2109693 has 4 divisors (see below), whose sum is σ = 2812928. Its totient is φ = 1406460.

The previous prime is 2109671. The next prime is 2109697. The reversal of 2109693 is 3969012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2109693 - 2¹⁰ = 2108669 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2109693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351613 + ... + 351618.

It is an arithmetic number, because the mean of its divisors is an integer number (703232).

2^2109693 is an apocalyptic number.

It is an amenable number.

2109693 is a deficient number, since it is larger than the sum of its proper divisors (703235).

2109693 is an equidigital number, since it uses as much as digits as its factorization.

2109693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703234.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 2109693 is about 1452.4782270313. The cubic root of 2109693 is about 128.2546403863.

The spelling of 2109693 in words is "two million, one hundred nine thousand, six hundred ninety-three".