2099870 has 8 divisors (see below), whose sum is σ = 3779784. Its totient is φ = 839944.

The previous prime is 2099863. The next prime is 2099887. The reversal of 2099870 is 789902.

2099870 = T₂₃₄ + T₂₃₅ + ... + T₂₉₃.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2099870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104984 + ... + 105003.

It is an arithmetic number, because the mean of its divisors is an integer number (472473).

2^2099870 is an apocalyptic number.

2099870 is a deficient number, since it is larger than the sum of its proper divisors (1679914).

2099870 is a wasteful number, since it uses less digits than its factorization.

2099870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209994.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2099870 is about 1449.0928196634. The cubic root of 2099870 is about 128.0552739793.

The spelling of 2099870 in words is "two million, ninety-nine thousand, eight hundred seventy".