397355817673 has 4 divisors (see below), whose sum is σ = 397391681488. Its totient is φ = 397319953860.

The previous prime is 397355817671. The next prime is 397355817679. The reversal of 397355817673 is 376718553793.

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 397355817673 - 2¹ = 397355817671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397355817671) 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, 17915283 + ... + 17937448.

It is an arithmetic number, because the mean of its divisors is an integer number (99347920372).

Almost surely, 2^397355817673 is an apocalyptic number.

It is an amenable number.

397355817673 is a deficient number, since it is larger than the sum of its proper divisors (35863815).

397355817673 is a wasteful number, since it uses less digits than its factorization.

397355817673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35863814.

The product of its digits is 100018800, while the sum is 64.

The spelling of 397355817673 in words is "three hundred ninety-seven billion, three hundred fifty-five million, eight hundred seventeen thousand, six hundred seventy-three".