398320471 has 2 divisors, whose sum is σ = 398320472. Its totient is φ = 398320470.

The previous prime is 398320469. The next prime is 398320487. The reversal of 398320471 is 174023893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398320471 - 2¹ = 398320469 is a prime.

It is a super-3 number, since 3×398320471³ (a number of 27 digits) contains 333 as substring.

Together with 398320469, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 398320471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398320451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199160235 + 199160236.

It is an arithmetic number, because the mean of its divisors is an integer number (199160236).

Almost surely, 2^398320471 is an apocalyptic number.

398320471 is a deficient number, since it is larger than the sum of its proper divisors (1).

398320471 is an equidigital number, since it uses as much as digits as its factorization.

398320471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 398320471 is about 19957.9676069484. The cubic root of 398320471 is about 735.7736133979.

The spelling of 398320471 in words is "three hundred ninety-eight million, three hundred twenty thousand, four hundred seventy-one".