2126197799 has 4 divisors (see below), whose sum is σ = 2319488520. Its totient is φ = 1932907080.

The previous prime is 2126197783. The next prime is 2126197811. The reversal of 2126197799 is 9977916212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2126197799 - 2⁴ = 2126197783 is a prime.

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 2126197799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126197739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96645344 + ... + 96645365.

It is an arithmetic number, because the mean of its divisors is an integer number (579872130).

Almost surely, 2^2126197799 is an apocalyptic number.

2126197799 is a deficient number, since it is larger than the sum of its proper divisors (193290721).

2126197799 is a wasteful number, since it uses less digits than its factorization.

2126197799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193290720.

The product of its digits is 857304, while the sum is 53.

The square root of 2126197799 is about 46110.7124104584. The cubic root of 2126197799 is about 1285.8823090562.

The spelling of 2126197799 in words is "two billion, one hundred twenty-six million, one hundred ninety-seven thousand, seven hundred ninety-nine".