398432397193 has 2 divisors, whose sum is σ = 398432397194. Its totient is φ = 398432397192.

The previous prime is 398432397151. The next prime is 398432397217. The reversal of 398432397193 is 391793234893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350715052944 + 47717344249 = 592212^2 + 218443^2 .

It is a cyclic number.

It is not a de Polignac number, because 398432397193 - 2¹⁷ = 398432266121 is a prime.

It is not a weakly prime, because it can be changed into another prime (398432397793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199216198596 + 199216198597.

It is an arithmetic number, because the mean of its divisors is an integer number (199216198597).

Almost surely, 2^398432397193 is an apocalyptic number.

It is an amenable number.

398432397193 is a deficient number, since it is larger than the sum of its proper divisors (1).

398432397193 is an equidigital number, since it uses as much as digits as its factorization.

398432397193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 61.

The spelling of 398432397193 in words is "three hundred ninety-eight billion, four hundred thirty-two million, three hundred ninety-seven thousand, one hundred ninety-three".