397693 has 4 divisors (see below), whose sum is σ = 415008. Its totient is φ = 380380.

The previous prime is 397687. The next prime is 397697. The reversal of 397693 is 396793.

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, and also an emirpimes, since its reverse is a distinct semiprime: 396793 = 419 ⋅947.

It is a cyclic number.

It is not a de Polignac number, because 397693 - 2⁹ = 397181 is a prime.

It is a d-powerful number, because it can be written as 3² + 9 + 6⁷ + 7⁶ + 9 + 3⁴ .

It is a Duffinian number.

397693 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397697) 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, 8623 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (103752).

2³⁹⁷⁶⁹³ is an apocalyptic number.

It is an amenable number.

397693 is a deficient number, since it is larger than the sum of its proper divisors (17315).

397693 is a wasteful number, since it uses less digits than its factorization.

397693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17314.

The product of its digits is 30618, while the sum is 37.

The square root of 397693 is about 630.6290510276. The cubic root of 397693 is about 73.5387057617.

Subtracting from 397693 its reverse (396793), we obtain a square (900 = 30²).

The spelling of 397693 in words is "three hundred ninety-seven thousand, six hundred ninety-three".