213246893 has 8 divisors (see below), whose sum is σ = 214961688. Its totient is φ = 211537984.

The previous prime is 213246877. The next prime is 213246907. The reversal of 213246893 is 398642312.

It can be written as a sum of positive squares in 4 ways, for example, as 97081609 + 116165284 = 9853^2 + 10778^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213246893 - 2⁴ = 213246877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213246853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95255 + ... + 97467.

It is an arithmetic number, because the mean of its divisors is an integer number (26870211).

Almost surely, 2^213246893 is an apocalyptic number.

It is an amenable number.

213246893 is a deficient number, since it is larger than the sum of its proper divisors (1714795).

213246893 is a wasteful number, since it uses less digits than its factorization.

213246893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943.

The product of its digits is 62208, while the sum is 38.

The square root of 213246893 is about 14602.9754844689. The cubic root of 213246893 is about 597.4399190302.

The spelling of 213246893 in words is "two hundred thirteen million, two hundred forty-six thousand, eight hundred ninety-three".