398755129 has 2 divisors, whose sum is σ = 398755130. Its totient is φ = 398755128.

The previous prime is 398755087. The next prime is 398755151. The reversal of 398755129 is 921557893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223801600 + 174953529 = 14960^2 + 13227^2 .

It is a cyclic number.

It is not a de Polignac number, because 398755129 - 2⁷ = 398755001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398755169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199377564 + 199377565.

It is an arithmetic number, because the mean of its divisors is an integer number (199377565).

Almost surely, 2^398755129 is an apocalyptic number.

It is an amenable number.

398755129 is a deficient number, since it is larger than the sum of its proper divisors (1).

398755129 is an equidigital number, since it uses as much as digits as its factorization.

398755129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 49.

The square root of 398755129 is about 19968.8539731252. The cubic root of 398755129 is about 736.0411480864.

The spelling of 398755129 in words is "three hundred ninety-eight million, seven hundred fifty-five thousand, one hundred twenty-nine".