2172099399 has 8 divisors (see below), whose sum is σ = 3048560640. Its totient is φ = 1371852216.

The previous prime is 2172099389. The next prime is 2172099403. The reversal of 2172099399 is 9939902712.

It is a happy number.

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

It is not a de Polignac number, because 2172099399 - 2⁴ = 2172099383 is a prime.

It is a super-2 number, since 2×2172099399² = 9436031598272322402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172099389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19053447 + ... + 19053560.

It is an arithmetic number, because the mean of its divisors is an integer number (381070080).

Almost surely, 2^2172099399 is an apocalyptic number.

2172099399 is a deficient number, since it is larger than the sum of its proper divisors (876461241).

2172099399 is a wasteful number, since it uses less digits than its factorization.

2172099399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38107029.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 2172099399 is about 46605.7871835677. The cubic root of 2172099399 is about 1295.0699661566.

The spelling of 2172099399 in words is "two billion, one hundred seventy-two million, ninety-nine thousand, three hundred ninety-nine".