340404313 has 4 divisors (see below), whose sum is σ = 340449588. Its totient is φ = 340359040.

The previous prime is 340404271. The next prime is 340404341. The reversal of 340404313 is 313404043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313404043 = 857 ⋅365699.

It can be written as a sum of positive squares in 2 ways, for example, as 240963529 + 99440784 = 15523^2 + 9972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340404313 is a prime.

It is a super-3 number, since 3×340404313³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340404353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8356 + ... + 27397.

It is an arithmetic number, because the mean of its divisors is an integer number (85112397).

Almost surely, 2^340404313 is an apocalyptic number.

It is an amenable number.

340404313 is a deficient number, since it is larger than the sum of its proper divisors (45275).

340404313 is an equidigital number, since it uses as much as digits as its factorization.

340404313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45274.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 340404313 is about 18450.0491327259. The cubic root of 340404313 is about 698.2297534863.

Adding to 340404313 its reverse (313404043), we get a palindrome (653808356).

The spelling of 340404313 in words is "three hundred forty million, four hundred four thousand, three hundred thirteen".