398722853 has 2 divisors, whose sum is σ = 398722854. Its totient is φ = 398722852.

The previous prime is 398722813. The next prime is 398722859. The reversal of 398722853 is 358227893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348270244 + 50452609 = 18662^2 + 7103^2 .

It is a cyclic number.

It is not a de Polignac number, because 398722853 - 2¹² = 398718757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398722798 and 398722807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398722859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199361426 + 199361427.

It is an arithmetic number, because the mean of its divisors is an integer number (199361427).

Almost surely, 2^398722853 is an apocalyptic number.

It is an amenable number.

398722853 is a deficient number, since it is larger than the sum of its proper divisors (1).

398722853 is an equidigital number, since it uses as much as digits as its factorization.

398722853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 398722853 is about 19968.0457982247. The cubic root of 398722853 is about 736.0212886929.

The spelling of 398722853 in words is "three hundred ninety-eight million, seven hundred twenty-two thousand, eight hundred fifty-three".