398170127 has 2 divisors, whose sum is σ = 398170128. Its totient is φ = 398170126.

The previous prime is 398170109. The next prime is 398170139. The reversal of 398170127 is 721071893.

It is a strong prime.

It is an emirp because it is prime and its reverse (721071893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398170127 - 2¹⁰ = 398169103 is a prime.

It is a super-2 number, since 2×398170127² = 317078900070392258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398170027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199085063 + 199085064.

It is an arithmetic number, because the mean of its divisors is an integer number (199085064).

Almost surely, 2^398170127 is an apocalyptic number.

398170127 is a deficient number, since it is larger than the sum of its proper divisors (1).

398170127 is an equidigital number, since it uses as much as digits as its factorization.

398170127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 398170127 is about 19954.2007356847. The cubic root of 398170127 is about 735.6810304347.

The spelling of 398170127 in words is "three hundred ninety-eight million, one hundred seventy thousand, one hundred twenty-seven".