340403 has 6 divisors (see below), whose sum is σ = 396036. Its totient is φ = 291732.

The previous prime is 340397. The next prime is 340409. The reversal of 340403 is 304043.

It is an interprime number because it is at equal distance from previous prime (340397) and next prime (340409).

It is not a de Polignac number, because 340403 - 2⁴ = 340387 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340403.

It is not an unprimeable number, because it can be changed into a prime (340409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3425 + ... + 3522.

It is an arithmetic number, because the mean of its divisors is an integer number (66006).

2³⁴⁰⁴⁰³ is an apocalyptic number.

340403 is a deficient number, since it is larger than the sum of its proper divisors (55633).

340403 is an equidigital number, since it uses as much as digits as its factorization.

340403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961 (or 6954 counting only the distinct ones).

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

The square root of 340403 is about 583.4406567938. The cubic root of 340403 is about 69.8228855753.

Adding to 340403 its reverse (304043), we get a palindrome (644446).

It can be divided in two parts, 34040 and 3, that added together give a palindrome (34043).

The spelling of 340403 in words is "three hundred forty thousand, four hundred three", and thus it is an iban number.