211406396393 has 4 divisors (see below), whose sum is σ = 217120082820. Its totient is φ = 205692709968.

The previous prime is 211406396371. The next prime is 211406396401. The reversal of 211406396393 is 393693604112.

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 115298956249 + 96107440144 = 339557^2 + 310012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211406396393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211406396323) 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, 2856843158 + ... + 2856843231.

It is an arithmetic number, because the mean of its divisors is an integer number (54280020705).

Almost surely, 2^211406396393 is an apocalyptic number.

It is an amenable number.

211406396393 is a deficient number, since it is larger than the sum of its proper divisors (5713686427).

211406396393 is an equidigital number, since it uses as much as digits as its factorization.

211406396393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713686426.

The product of its (nonzero) digits is 629856, while the sum is 47.

The spelling of 211406396393 in words is "two hundred eleven billion, four hundred six million, three hundred ninety-six thousand, three hundred ninety-three".