2099699 has 12 divisors (see below), whose sum is σ = 2480184. Its totient is φ = 1772064.

The previous prime is 2099677. The next prime is 2099707. The reversal of 2099699 is 9969902.

It is a de Polignac number, because none of the positive numbers 2^k-2099699 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3284 + ... + 3870.

It is an arithmetic number, because the mean of its divisors is an integer number (206682).

2^2099699 is an apocalyptic number.

2099699 is a deficient number, since it is larger than the sum of its proper divisors (380485).

2099699 is an equidigital number, since it uses as much as digits as its factorization.

2099699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 2099699 is about 1449.0338160305. The cubic root of 2099699 is about 128.0517978837.

It can be divided in two parts, 209 and 9699, that multiplied together give a triangular number (2027091 = T₂₀₁₃).

The spelling of 2099699 in words is "two million, ninety-nine thousand, six hundred ninety-nine".