340491 has 4 divisors (see below), whose sum is σ = 453992. Its totient is φ = 226992.

The previous prime is 340481. The next prime is 340519. The reversal of 340491 is 194043.

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

It is not a de Polignac number, because 340491 - 2¹⁰ = 339467 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340451) 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, 56746 + ... + 56751.

It is an arithmetic number, because the mean of its divisors is an integer number (113498).

2³⁴⁰⁴⁹¹ is an apocalyptic number.

340491 is a deficient number, since it is larger than the sum of its proper divisors (113501).

340491 is a wasteful number, since it uses less digits than its factorization.

340491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113500.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 340491 is about 583.5160666168. The cubic root of 340491 is about 69.8289018604.

The spelling of 340491 in words is "three hundred forty thousand, four hundred ninety-one".