398296044257 has 2 divisors, whose sum is σ = 398296044258. Its totient is φ = 398296044256.

The previous prime is 398296044247. The next prime is 398296044323. The reversal of 398296044257 is 752440692893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380832157456 + 17463886801 = 617116^2 + 132151^2 .

It is a cyclic number.

It is not a de Polignac number, because 398296044257 - 2¹⁸ = 398295782113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398296044196 and 398296044205.

It is not a weakly prime, because it can be changed into another prime (398296044217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199148022128 + 199148022129.

It is an arithmetic number, because the mean of its divisors is an integer number (199148022129).

Almost surely, 2^398296044257 is an apocalyptic number.

It is an amenable number.

398296044257 is a deficient number, since it is larger than the sum of its proper divisors (1).

398296044257 is an equidigital number, since it uses as much as digits as its factorization.

398296044257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 398296044257 in words is "three hundred ninety-eight billion, two hundred ninety-six million, forty-four thousand, two hundred fifty-seven".