398109196237 has 2 divisors, whose sum is σ = 398109196238. Its totient is φ = 398109196236.

The previous prime is 398109196217. The next prime is 398109196253. The reversal of 398109196237 is 732691901893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224037502276 + 174071693961 = 473326^2 + 417219^2 .

It is a cyclic number.

It is not a de Polignac number, because 398109196237 - 2³¹ = 395961712589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398109196217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199054598118 + 199054598119.

It is an arithmetic number, because the mean of its divisors is an integer number (199054598119).

Almost surely, 2^398109196237 is an apocalyptic number.

It is an amenable number.

398109196237 is a deficient number, since it is larger than the sum of its proper divisors (1).

398109196237 is an equidigital number, since it uses as much as digits as its factorization.

398109196237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 398109196237 in words is "three hundred ninety-eight billion, one hundred nine million, one hundred ninety-six thousand, two hundred thirty-seven".