400343 has 4 divisors (see below), whose sum is σ = 406968. Its totient is φ = 393720.

The previous prime is 400339. The next prime is 400381. The reversal of 400343 is 343004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400343 - 2² = 400339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400313) 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, 3221 + ... + 3342.

It is an arithmetic number, because the mean of its divisors is an integer number (101742).

2⁴⁰⁰³⁴³ is an apocalyptic number.

400343 is a deficient number, since it is larger than the sum of its proper divisors (6625).

400343 is an equidigital number, since it uses as much as digits as its factorization.

400343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 400343 is about 632.7266392369. The cubic root of 400343 is about 73.7016843360.

Adding to 400343 its reverse (343004), we get a palindrome (743347).

The spelling of 400343 in words is "four hundred thousand, three hundred forty-three", and thus it is an iban number.