2168041999 has 4 divisors (see below), whose sum is σ = 2169247600. Its totient is φ = 2166836400.

The previous prime is 2168041963. The next prime is 2168042017. The reversal of 2168041999 is 9991408612.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2168041999 is a prime.

It is a super-2 number, since 2×2168041999² = 9400812218855832002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168041919) 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, 600099 + ... + 603700.

It is an arithmetic number, because the mean of its divisors is an integer number (542311900).

Almost surely, 2^2168041999 is an apocalyptic number.

2168041999 is a deficient number, since it is larger than the sum of its proper divisors (1205601).

2168041999 is a wasteful number, since it uses less digits than its factorization.

2168041999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205600.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 2168041999 is about 46562.2379079872. The cubic root of 2168041999 is about 1294.2630828726.

The spelling of 2168041999 in words is "two billion, one hundred sixty-eight million, forty-one thousand, nine hundred ninety-nine".