340539919 has 4 divisors (see below), whose sum is σ = 348459496. Its totient is φ = 332620344.

The previous prime is 340539889. The next prime is 340539943. The reversal of 340539919 is 919935043.

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 340539919 - 2¹⁷ = 340408847 is a prime.

It is a super-2 number, since 2×340539919² = 231934872865053122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 7919533 = 340539919 / (3 + 4 + 0 + 5 + 3 + 9 + 9 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340539949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3959724 + ... + 3959809.

It is an arithmetic number, because the mean of its divisors is an integer number (87114874).

Almost surely, 2^340539919 is an apocalyptic number.

340539919 is a deficient number, since it is larger than the sum of its proper divisors (7919577).

340539919 is an equidigital number, since it uses as much as digits as its factorization.

340539919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919576.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 340539919 is about 18453.7237163668. The cubic root of 340539919 is about 698.3224585139.

The spelling of 340539919 in words is "three hundred forty million, five hundred thirty-nine thousand, nine hundred nineteen".