398192774929 has 2 divisors, whose sum is σ = 398192774930. Its totient is φ = 398192774928.

The previous prime is 398192774923. The next prime is 398192774933. The reversal of 398192774929 is 929477291893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312422866704 + 85769908225 = 558948^2 + 292865^2 .

It is a cyclic number.

It is not a de Polignac number, because 398192774929 - 2⁷ = 398192774801 is a prime.

It is not a weakly prime, because it can be changed into another prime (398192774923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199096387464 + 199096387465.

It is an arithmetic number, because the mean of its divisors is an integer number (199096387465).

Almost surely, 2^398192774929 is an apocalyptic number.

It is an amenable number.

398192774929 is a deficient number, since it is larger than the sum of its proper divisors (1).

398192774929 is an equidigital number, since it uses as much as digits as its factorization.

398192774929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123451776, while the sum is 70.

The spelling of 398192774929 in words is "three hundred ninety-eight billion, one hundred ninety-two million, seven hundred seventy-four thousand, nine hundred twenty-nine".