838009213 has 4 divisors (see below), whose sum is σ = 838070368. Its totient is φ = 837948060.

The previous prime is 838009199. The next prime is 838009279. The reversal of 838009213 is 312900838.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 838009213 - 2⁵ = 838009181 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 (838009283) 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, 520 + ... + 40942.

It is an arithmetic number, because the mean of its divisors is an integer number (209517592).

Almost surely, 2^838009213 is an apocalyptic number.

It is an amenable number.

838009213 is a deficient number, since it is larger than the sum of its proper divisors (61155).

838009213 is a wasteful number, since it uses less digits than its factorization.

838009213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61154.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 838009213 is about 28948.3887807249. The cubic root of 838009213 is about 942.7928156505.

The spelling of 838009213 in words is "eight hundred thirty-eight million, nine thousand, two hundred thirteen".