838223137 has 2 divisors, whose sum is σ = 838223138. Its totient is φ = 838223136.

The previous prime is 838223119. The next prime is 838223149. The reversal of 838223137 is 731322838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634989601 + 203233536 = 25199^2 + 14256^2 .

It is a cyclic number.

It is not a de Polignac number, because 838223137 - 2¹¹ = 838221089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 838223096 and 838223105.

It is not a weakly prime, because it can be changed into another prime (838223107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419111568 + 419111569.

It is an arithmetic number, because the mean of its divisors is an integer number (419111569).

Almost surely, 2^838223137 is an apocalyptic number.

It is an amenable number.

838223137 is a deficient number, since it is larger than the sum of its proper divisors (1).

838223137 is an equidigital number, since it uses as much as digits as its factorization.

838223137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 838223137 is about 28952.0834656161. The cubic root of 838223137 is about 942.8730330863.

The spelling of 838223137 in words is "eight hundred thirty-eight million, two hundred twenty-three thousand, one hundred thirty-seven".