397985787589793 has 24 divisors (see below), whose sum is σ = 439098298602048. Its totient is φ = 360430069127232.

The previous prime is 397985787589771. The next prime is 397985787589799.

397985787589793 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 397985787589793 - 2⁶ = 397985787589729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397985787589799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336255146 + ... + 337436652.

It is an arithmetic number, because the mean of its divisors is an integer number (18295762441752).

Almost surely, 2^{397985787589793} is an apocalyptic number.

It is an amenable number.

397985787589793 is a deficient number, since it is larger than the sum of its proper divisors (41112511012255).

397985787589793 is a wasteful number, since it uses less digits than its factorization.

397985787589793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219193 (or 1219180 counting only the distinct ones).

The product of its digits is 1814741107200, while the sum is 104.

The spelling of 397985787589793 in words is "three hundred ninety-seven trillion, nine hundred eighty-five billion, seven hundred eighty-seven million, five hundred eighty-nine thousand, seven hundred ninety-three".