838835813 has 2 divisors, whose sum is σ = 838835814. Its totient is φ = 838835812.

The previous prime is 838835791. The next prime is 838835821. The reversal of 838835813 is 318538838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685497124 + 153338689 = 26182^2 + 12383^2 .

It is a cyclic number.

It is not a de Polignac number, because 838835813 - 2⁶ = 838835749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838835213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419417906 + 419417907.

It is an arithmetic number, because the mean of its divisors is an integer number (419417907).

Almost surely, 2^838835813 is an apocalyptic number.

It is an amenable number.

838835813 is a deficient number, since it is larger than the sum of its proper divisors (1).

838835813 is an equidigital number, since it uses as much as digits as its factorization.

838835813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 47.

The square root of 838835813 is about 28962.6623948835. The cubic root of 838835813 is about 943.1026994542.

The spelling of 838835813 in words is "eight hundred thirty-eight million, eight hundred thirty-five thousand, eight hundred thirteen".