213738873 has 4 divisors (see below), whose sum is σ = 284985168. Its totient is φ = 142492580.

The previous prime is 213738871. The next prime is 213738881. The reversal of 213738873 is 378837312.

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 not a de Polignac number, because 213738873 - 2¹ = 213738871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213738871) 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 3 ways as a sum of consecutive naturals, for example, 35623143 + ... + 35623148.

It is an arithmetic number, because the mean of its divisors is an integer number (71246292).

Almost surely, 2^213738873 is an apocalyptic number.

It is an amenable number.

213738873 is a deficient number, since it is larger than the sum of its proper divisors (71246295).

213738873 is an equidigital number, since it uses as much as digits as its factorization.

213738873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71246294.

The product of its digits is 169344, while the sum is 42.

The square root of 213738873 is about 14619.8109768902. The cubic root of 213738873 is about 597.8990155834.

The spelling of 213738873 in words is "two hundred thirteen million, seven hundred thirty-eight thousand, eight hundred seventy-three".