398958493 has 2 divisors, whose sum is σ = 398958494. Its totient is φ = 398958492.

The previous prime is 398958451. The next prime is 398958517. The reversal of 398958493 is 394859893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335549124 + 63409369 = 18318^2 + 7963^2 .

It is a cyclic number.

It is not a de Polignac number, because 398958493 - 2⁹ = 398957981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398928493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199479246 + 199479247.

It is an arithmetic number, because the mean of its divisors is an integer number (199479247).

Almost surely, 2^398958493 is an apocalyptic number.

It is an amenable number.

398958493 is a deficient number, since it is larger than the sum of its proper divisors (1).

398958493 is an equidigital number, since it uses as much as digits as its factorization.

398958493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 58.

The square root of 398958493 is about 19973.9453538854. The cubic root of 398958493 is about 736.1662531297.

The spelling of 398958493 in words is "three hundred ninety-eight million, nine hundred fifty-eight thousand, four hundred ninety-three".