213663743 has 4 divisors (see below), whose sum is σ = 215866560. Its totient is φ = 211460928.

The previous prime is 213663731. The next prime is 213663757. The reversal of 213663743 is 347366312.

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

It is a cyclic number.

It is not a de Polignac number, because 213663743 - 2⁴ = 213663727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213663763) 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, 1101263 + ... + 1101456.

It is an arithmetic number, because the mean of its divisors is an integer number (53966640).

Almost surely, 2^213663743 is an apocalyptic number.

213663743 is a deficient number, since it is larger than the sum of its proper divisors (2202817).

213663743 is an equidigital number, since it uses as much as digits as its factorization.

213663743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202816.

The product of its digits is 54432, while the sum is 35.

The square root of 213663743 is about 14617.2412923917. The cubic root of 213663743 is about 597.8289528060.

The spelling of 213663743 in words is "two hundred thirteen million, six hundred sixty-three thousand, seven hundred forty-three".