2168863693 has 4 divisors (see below), whose sum is σ = 2169462688. Its totient is φ = 2168264700.

The previous prime is 2168863681. The next prime is 2168863717. The reversal of 2168863693 is 3963688612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2168863693 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 2168863693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168863663) 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, 294033 + ... + 301318.

It is an arithmetic number, because the mean of its divisors is an integer number (542365672).

Almost surely, 2^2168863693 is an apocalyptic number.

It is an amenable number.

2168863693 is a deficient number, since it is larger than the sum of its proper divisors (598995).

2168863693 is an equidigital number, since it uses as much as digits as its factorization.

2168863693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598994.

The product of its digits is 2239488, while the sum is 52.

The square root of 2168863693 is about 46571.0606815005. The cubic root of 2168863693 is about 1294.4265719998.

The spelling of 2168863693 in words is "two billion, one hundred sixty-eight million, eight hundred sixty-three thousand, six hundred ninety-three".