398106971919 has 6 divisors (see below), whose sum is σ = 575043403896. Its totient is φ = 265404647940.

The previous prime is 398106971809. The next prime is 398106971921. The reversal of 398106971919 is 919179601893.

It is not a de Polignac number, because 398106971919 - 2²⁰ = 398105923343 is a prime.

It is a super-2 number, since 2×398106971919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398106931919) 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 5 ways as a sum of consecutive naturals, for example, 22117053987 + ... + 22117054004.

It is an arithmetic number, because the mean of its divisors is an integer number (95840567316).

Almost surely, 2^398106971919 is an apocalyptic number.

398106971919 is a deficient number, since it is larger than the sum of its proper divisors (176936431977).

398106971919 is a wasteful number, since it uses less digits than its factorization.

398106971919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44234107997 (or 44234107994 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 63.

The spelling of 398106971919 in words is "three hundred ninety-eight billion, one hundred six million, nine hundred seventy-one thousand, nine hundred nineteen".