838475038813 has 2 divisors, whose sum is σ = 838475038814. Its totient is φ = 838475038812.

The previous prime is 838475038811. The next prime is 838475038897. The reversal of 838475038813 is 318830574838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779191067524 + 59283971289 = 882718^2 + 243483^2 .

It is a cyclic number.

It is not a de Polignac number, because 838475038813 - 2¹ = 838475038811 is a prime.

Together with 838475038811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838475038811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419237519406 + 419237519407.

It is an arithmetic number, because the mean of its divisors is an integer number (419237519407).

Almost surely, 2^838475038813 is an apocalyptic number.

It is an amenable number.

838475038813 is a deficient number, since it is larger than the sum of its proper divisors (1).

838475038813 is an equidigital number, since it uses as much as digits as its factorization.

838475038813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 838475038813 in words is "eight hundred thirty-eight billion, four hundred seventy-five million, thirty-eight thousand, eight hundred thirteen".