213894329 has 4 divisors (see below), whose sum is σ = 233339280. Its totient is φ = 194449380.

The previous prime is 213894313. The next prime is 213894367. The reversal of 213894329 is 923498312.

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 213894329 - 2⁴ = 213894313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213894929) 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, 9722459 + ... + 9722480.

It is an arithmetic number, because the mean of its divisors is an integer number (58334820).

Almost surely, 2^213894329 is an apocalyptic number.

It is an amenable number.

213894329 is a deficient number, since it is larger than the sum of its proper divisors (19444951).

213894329 is a wasteful number, since it uses less digits than its factorization.

213894329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19444950.

The product of its digits is 93312, while the sum is 41.

The square root of 213894329 is about 14625.1266319304. The cubic root of 213894329 is about 598.0439345729.

The spelling of 213894329 in words is "two hundred thirteen million, eight hundred ninety-four thousand, three hundred twenty-nine".