397981189793 has 16 divisors (see below), whose sum is σ = 453073392000. Its totient is φ = 346043470080.

The previous prime is 397981189759. The next prime is 397981189829.

397981189793 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 397981189793 - 2¹² = 397981185697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397981189793.

It is not an unprimeable number, because it can be changed into a prime (397981189093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3601163 + ... + 3710031.

It is an arithmetic number, because the mean of its divisors is an integer number (28317087000).

Almost surely, 2^397981189793 is an apocalyptic number.

It is an amenable number.

397981189793 is a deficient number, since it is larger than the sum of its proper divisors (55092202207).

397981189793 is a wasteful number, since it uses less digits than its factorization.

397981189793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123352.

The product of its digits is 185177664, while the sum is 74.

It can be divided in two parts, 3979811 and 89793, that added together give a palindrome (4069604).

The spelling of 397981189793 in words is "three hundred ninety-seven billion, nine hundred eighty-one million, one hundred eighty-nine thousand, seven hundred ninety-three".