340505313 has 4 divisors (see below), whose sum is σ = 454007088. Its totient is φ = 227003540.

The previous prime is 340505303. The next prime is 340505329. The reversal of 340505313 is 313505043.

It is a happy number.

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 340505313 - 2⁸ = 340505057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340505303) 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, 56750883 + ... + 56750888.

It is an arithmetic number, because the mean of its divisors is an integer number (113501772).

Almost surely, 2^340505313 is an apocalyptic number.

It is an amenable number.

340505313 is a deficient number, since it is larger than the sum of its proper divisors (113501775).

340505313 is a wasteful number, since it uses less digits than its factorization.

340505313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113501774.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 340505313 is about 18452.7860498083. The cubic root of 340505313 is about 698.2988029753.

The spelling of 340505313 in words is "three hundred forty million, five hundred five thousand, three hundred thirteen".