838197813 has 16 divisors (see below), whose sum is σ = 1137628800. Its totient is φ = 548842560.

The previous prime is 838197799. The next prime is 838197853. The reversal of 838197813 is 318791838.

It is not a de Polignac number, because 838197813 - 2⁵ = 838197781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838197853) 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 15 ways as a sum of consecutive naturals, for example, 49983 + ... + 64611.

It is an arithmetic number, because the mean of its divisors is an integer number (71101800).

Almost surely, 2^838197813 is an apocalyptic number.

It is an amenable number.

838197813 is a deficient number, since it is larger than the sum of its proper divisors (299430987).

838197813 is a wasteful number, since it uses less digits than its factorization.

838197813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14972.

The product of its digits is 290304, while the sum is 48.

The square root of 838197813 is about 28951.6461190033. The cubic root of 838197813 is about 942.8635377797.

The spelling of 838197813 in words is "eight hundred thirty-eight million, one hundred ninety-seven thousand, eight hundred thirteen".