398717671 has 8 divisors (see below), whose sum is σ = 437737104. Its totient is φ = 360160320.

The previous prime is 398717663. The next prime is 398717681. The reversal of 398717671 is 176717893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398717671 - 2³ = 398717663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398717621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113710 + ... + 117163.

It is an arithmetic number, because the mean of its divisors is an integer number (54717138).

Almost surely, 2^398717671 is an apocalyptic number.

398717671 is a deficient number, since it is larger than the sum of its proper divisors (39019433).

398717671 is a wasteful number, since it uses less digits than its factorization.

398717671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231041.

The product of its digits is 444528, while the sum is 49.

The square root of 398717671 is about 19967.9160404886. The cubic root of 398717671 is about 736.0181001131.

The spelling of 398717671 in words is "three hundred ninety-eight million, seven hundred seventeen thousand, six hundred seventy-one".