838813 has 2 divisors, whose sum is σ = 838814. Its totient is φ = 838812.

The previous prime is 838807. The next prime is 838837. The reversal of 838813 is 318838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710649 + 128164 = 843^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 838813 - 2⁵ = 838781 is a prime.

It is an Ulam number.

838813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419406 + 419407.

It is an arithmetic number, because the mean of its divisors is an integer number (419407).

2⁸³⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

838813 is a deficient number, since it is larger than the sum of its proper divisors (1).

838813 is an equidigital number, since it uses as much as digits as its factorization.

838813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 838813 is about 915.8673484736. The cubic root of 838813 is about 94.3094149828.

The spelling of 838813 in words is "eight hundred thirty-eight thousand, eight hundred thirteen".