398126429 has 2 divisors, whose sum is σ = 398126430. Its totient is φ = 398126428.

The previous prime is 398126419. The next prime is 398126467. The reversal of 398126429 is 924621893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349615204 + 48511225 = 18698^2 + 6965^2 .

It is a cyclic number.

It is not a de Polignac number, because 398126429 - 2⁸ = 398126173 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398126429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398126419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199063214 + 199063215.

It is an arithmetic number, because the mean of its divisors is an integer number (199063215).

Almost surely, 2^398126429 is an apocalyptic number.

It is an amenable number.

398126429 is a deficient number, since it is larger than the sum of its proper divisors (1).

398126429 is an equidigital number, since it uses as much as digits as its factorization.

398126429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 398126429 is about 19953.1057482288. The cubic root of 398126429 is about 735.6541165072.

The spelling of 398126429 in words is "three hundred ninety-eight million, one hundred twenty-six thousand, four hundred twenty-nine".