397801 has 4 divisors (see below), whose sum is σ = 400000. Its totient is φ = 395604.

The previous prime is 397799. The next prime is 397807. The reversal of 397801 is 108793.

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 397801 - 2¹ = 397799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397801.

It is not an unprimeable number, because it can be changed into a prime (397807) 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, 801 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (100000).

2³⁹⁷⁸⁰¹ is an apocalyptic number.

It is an amenable number.

397801 is a deficient number, since it is larger than the sum of its proper divisors (2199).

397801 is a wasteful number, since it uses less digits than its factorization.

397801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 397801 is about 630.7146740009. The cubic root of 397801 is about 73.5453620362.

The spelling of 397801 in words is "three hundred ninety-seven thousand, eight hundred one".