398384971 has 4 divisors (see below), whose sum is σ = 398602512. Its totient is φ = 398167432.

The previous prime is 398384969. The next prime is 398384983. The reversal of 398384971 is 179483893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398384971 - 2¹ = 398384969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398384071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106000 + ... + 109693.

It is an arithmetic number, because the mean of its divisors is an integer number (99650628).

Almost surely, 2^398384971 is an apocalyptic number.

398384971 is a deficient number, since it is larger than the sum of its proper divisors (217541).

398384971 is a wasteful number, since it uses less digits than its factorization.

398384971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217540.

The product of its digits is 1306368, while the sum is 52.

The square root of 398384971 is about 19959.5834375370. The cubic root of 398384971 is about 735.8133258407.

The spelling of 398384971 in words is "three hundred ninety-eight million, three hundred eighty-four thousand, nine hundred seventy-one".