397653 has 8 divisors (see below), whose sum is σ = 536928. Its totient is φ = 261744.

The previous prime is 397643. The next prime is 397673. The reversal of 397653 is 356793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397653 - 2⁶ = 397589 is a prime.

It is a d-powerful number, because it can be written as 3³ + 9 + 6⁷ + 7⁶ + 5 + 3³ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550 + ... + 1047.

It is an arithmetic number, because the mean of its divisors is an integer number (67116).

2³⁹⁷⁶⁵³ is an apocalyptic number.

It is an amenable number.

397653 is a deficient number, since it is larger than the sum of its proper divisors (139275).

397653 is a wasteful number, since it uses less digits than its factorization.

397653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683.

The product of its digits is 17010, while the sum is 33.

The square root of 397653 is about 630.5973358650. The cubic root of 397653 is about 73.5362401690.

The spelling of 397653 in words is "three hundred ninety-seven thousand, six hundred fifty-three".