838205117 has 4 divisors (see below), whose sum is σ = 840417120. Its totient is φ = 835993116.

The previous prime is 838205101. The next prime is 838205143. The reversal of 838205117 is 711502838.

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 838205117 - 2⁴ = 838205101 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 (838205177) 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, 1105433 + ... + 1106190.

It is an arithmetic number, because the mean of its divisors is an integer number (210104280).

Almost surely, 2^838205117 is an apocalyptic number.

It is an amenable number.

838205117 is a deficient number, since it is larger than the sum of its proper divisors (2212003).

838205117 is a wasteful number, since it uses less digits than its factorization.

838205117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212002.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 838205117 is about 28951.7722600880. The cubic root of 838205117 is about 942.8662764551.

The spelling of 838205117 in words is "eight hundred thirty-eight million, two hundred five thousand, one hundred seventeen".