397836793 has 4 divisors (see below), whose sum is σ = 398572708. Its totient is φ = 397100880.

The previous prime is 397836721. The next prime is 397836809. The reversal of 397836793 is 397638793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 397638793 = 97 ⋅4099369.

It can be written as a sum of positive squares in 2 ways, for example, as 58798224 + 339038569 = 7668^2 + 18413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397836793 is a prime.

It is a super-2 number, since 2×397836793² = 316548227729049698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397836713) 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 3 ways as a sum of consecutive naturals, for example, 367146 + ... + 368227.

It is an arithmetic number, because the mean of its divisors is an integer number (99643177).

Almost surely, 2^397836793 is an apocalyptic number.

It is an amenable number.

397836793 is a deficient number, since it is larger than the sum of its proper divisors (735915).

397836793 is an equidigital number, since it uses as much as digits as its factorization.

397836793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735914.

The product of its digits is 5143824, while the sum is 55.

The square root of 397836793 is about 19945.8465099880. The cubic root of 397836793 is about 735.4756777075.

The spelling of 397836793 in words is "three hundred ninety-seven million, eight hundred thirty-six thousand, seven hundred ninety-three".