397447744793 has 4 divisors (see below), whose sum is σ = 433579357968. Its totient is φ = 361316131620.

The previous prime is 397447744789. The next prime is 397447744867.

It is a happy number.

397447744793 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 397447744793 - 2² = 397447744789 is a prime.

It is a super-2 number, since 2×397447744793² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397447714793) 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, 18065806571 + ... + 18065806592.

It is an arithmetic number, because the mean of its divisors is an integer number (108394839492).

Almost surely, 2^397447744793 is an apocalyptic number.

It is an amenable number.

397447744793 is a deficient number, since it is larger than the sum of its proper divisors (36131613175).

397447744793 is a wasteful number, since it uses less digits than its factorization.

397447744793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36131613174.

The product of its digits is 448084224, while the sum is 68.

The spelling of 397447744793 in words is "three hundred ninety-seven billion, four hundred forty-seven million, seven hundred forty-four thousand, seven hundred ninety-three".