398826134269 has 2 divisors, whose sum is σ = 398826134270. Its totient is φ = 398826134268.

The previous prime is 398826134219. The next prime is 398826134281. The reversal of 398826134269 is 962431628893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378280352025 + 20545782244 = 615045^2 + 143338^2 .

It is a cyclic number.

It is not a de Polignac number, because 398826134269 - 2¹⁷ = 398826003197 is a prime.

It is a super-2 number, since 2×398826134269² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398826134219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199413067134 + 199413067135.

It is an arithmetic number, because the mean of its divisors is an integer number (199413067135).

Almost surely, 2^398826134269 is an apocalyptic number.

It is an amenable number.

398826134269 is a deficient number, since it is larger than the sum of its proper divisors (1).

398826134269 is an equidigital number, since it uses as much as digits as its factorization.

398826134269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 61.

The spelling of 398826134269 in words is "three hundred ninety-eight billion, eight hundred twenty-six million, one hundred thirty-four thousand, two hundred sixty-nine".