838398017 has 2 divisors, whose sum is σ = 838398018. Its totient is φ = 838398016.

The previous prime is 838397951. The next prime is 838398019. The reversal of 838398017 is 710893838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659667856 + 178730161 = 25684^2 + 13369^2 .

It is a cyclic number.

It is not a de Polignac number, because 838398017 - 2⁸ = 838397761 is a prime.

It is a super-2 number, since 2×838398017² = 1405822469819064578, which contains 22 as substring.

Together with 838398019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (838398019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419199008 + 419199009.

It is an arithmetic number, because the mean of its divisors is an integer number (419199009).

Almost surely, 2^838398017 is an apocalyptic number.

It is an amenable number.

838398017 is a deficient number, since it is larger than the sum of its proper divisors (1).

838398017 is an equidigital number, since it uses as much as digits as its factorization.

838398017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 838398017 is about 28955.1034707182. The cubic root of 838398017 is about 942.9385996254.

The spelling of 838398017 in words is "eight hundred thirty-eight million, three hundred ninety-eight thousand, seventeen".