397867768793 has 4 divisors (see below), whose sum is σ = 434037565968. Its totient is φ = 361697971620.

The previous prime is 397867768729. The next prime is 397867768801.

397867768793 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 397867768793 - 2⁶ = 397867768729 is a prime.

It is a super-2 number, since 2×397867768793² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397867768993) 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, 18084898571 + ... + 18084898592.

It is an arithmetic number, because the mean of its divisors is an integer number (108509391492).

Almost surely, 2^397867768793 is an apocalyptic number.

It is an amenable number.

397867768793 is a deficient number, since it is larger than the sum of its proper divisors (36169797175).

397867768793 is a wasteful number, since it uses less digits than its factorization.

397867768793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36169797174.

The product of its digits is 4032758016, while the sum is 80.

The spelling of 397867768793 in words is "three hundred ninety-seven billion, eight hundred sixty-seven million, seven hundred sixty-eight thousand, seven hundred ninety-three".