213973833 has 4 divisors (see below), whose sum is σ = 285298448. Its totient is φ = 142649220.

The previous prime is 213973817. The next prime is 213973841. The reversal of 213973833 is 338379312.

213973833 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213973833 - 2⁴ = 213973817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213973791 and 213973800.

It is not an unprimeable number, because it can be changed into a prime (213973843) 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, 35662303 + ... + 35662308.

It is an arithmetic number, because the mean of its divisors is an integer number (71324612).

Almost surely, 2^213973833 is an apocalyptic number.

It is an amenable number.

213973833 is a deficient number, since it is larger than the sum of its proper divisors (71324615).

213973833 is an equidigital number, since it uses as much as digits as its factorization.

213973833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71324614.

The product of its digits is 81648, while the sum is 39.

The square root of 213973833 is about 14627.8444413386. The cubic root of 213973833 is about 598.1180225512.

The spelling of 213973833 in words is "two hundred thirteen million, nine hundred seventy-three thousand, eight hundred thirty-three".