340605691 has 8 divisors (see below), whose sum is σ = 344283264. Its totient is φ = 336947520.

The previous prime is 340605641. The next prime is 340605721. The reversal of 340605691 is 196506043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340605691 - 2⁹ = 340605179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340605641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31926 + ... + 41236.

It is an arithmetic number, because the mean of its divisors is an integer number (43035408).

Almost surely, 2^340605691 is an apocalyptic number.

340605691 is a deficient number, since it is larger than the sum of its proper divisors (3677573).

340605691 is a wasteful number, since it uses less digits than its factorization.

340605691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9701.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 340605691 is about 18455.5057096792. The cubic root of 340605691 is about 698.3674137017.

The spelling of 340605691 in words is "three hundred forty million, six hundred five thousand, six hundred ninety-one".