398111773 has 2 divisors, whose sum is σ = 398111774. Its totient is φ = 398111772.

The previous prime is 398111771. The next prime is 398111783. The reversal of 398111773 is 377111893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323928004 + 74183769 = 17998^2 + 8613^2 .

It is a cyclic number.

It is not a de Polignac number, because 398111773 - 2¹ = 398111771 is a prime.

Together with 398111771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398111771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199055886 + 199055887.

It is an arithmetic number, because the mean of its divisors is an integer number (199055887).

Almost surely, 2^398111773 is an apocalyptic number.

It is an amenable number.

398111773 is a deficient number, since it is larger than the sum of its proper divisors (1).

398111773 is an equidigital number, since it uses as much as digits as its factorization.

398111773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 398111773 is about 19952.7384837270. The cubic root of 398111773 is about 735.6450893253.

The spelling of 398111773 in words is "three hundred ninety-eight million, one hundred eleven thousand, seven hundred seventy-three".