212163793 has 4 divisors (see below), whose sum is σ = 212203060. Its totient is φ = 212124528.

The previous prime is 212163779. The next prime is 212163851. The reversal of 212163793 is 397361212.

212163793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123276609 + 88887184 = 11103^2 + 9428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212163793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212163713) 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, 9930 + ... + 22867.

It is an arithmetic number, because the mean of its divisors is an integer number (53050765).

Almost surely, 2^212163793 is an apocalyptic number.

It is an amenable number.

212163793 is a deficient number, since it is larger than the sum of its proper divisors (39267).

212163793 is an equidigital number, since it uses as much as digits as its factorization.

212163793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39266.

The product of its digits is 13608, while the sum is 34.

The square root of 212163793 is about 14565.8433672754. The cubic root of 212163793 is about 596.4267181548.

The spelling of 212163793 in words is "two hundred twelve million, one hundred sixty-three thousand, seven hundred ninety-three".