398584423 has 2 divisors, whose sum is σ = 398584424. Its totient is φ = 398584422.

The previous prime is 398584379. The next prime is 398584429. The reversal of 398584423 is 324485893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398584423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398584429) 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, 199292211 + 199292212.

It is an arithmetic number, because the mean of its divisors is an integer number (199292212).

Almost surely, 2^398584423 is an apocalyptic number.

398584423 is a deficient number, since it is larger than the sum of its proper divisors (1).

398584423 is an equidigital number, since it uses as much as digits as its factorization.

398584423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 46.

The square root of 398584423 is about 19964.5792091895. The cubic root of 398584423 is about 735.9361006818.

It can be divided in two parts, 398 and 584423, that added together give a triangular number (584821 = T₁₀₈₁).

The spelling of 398584423 in words is "three hundred ninety-eight million, five hundred eighty-four thousand, four hundred twenty-three".