398071259909 has 4 divisors (see below), whose sum is σ = 415378706016. Its totient is φ = 380763813804.

The previous prime is 398071259891. The next prime is 398071259921. The reversal of 398071259909 is 909952170893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398071259909 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 (398071279909) 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, 8653723019 + ... + 8653723064.

It is an arithmetic number, because the mean of its divisors is an integer number (103844676504).

Almost surely, 2^398071259909 is an apocalyptic number.

It is an amenable number.

398071259909 is a deficient number, since it is larger than the sum of its proper divisors (17307446107).

398071259909 is a wasteful number, since it uses less digits than its factorization.

398071259909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17307446106.

The product of its (nonzero) digits is 11022480, while the sum is 62.

The spelling of 398071259909 in words is "three hundred ninety-eight billion, seventy-one million, two hundred fifty-nine thousand, nine hundred nine".