340660687 has 2 divisors, whose sum is σ = 340660688. Its totient is φ = 340660686.

The previous prime is 340660597. The next prime is 340660693. The reversal of 340660687 is 786066043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340660687 - 2¹⁹ = 340136399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340660387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170330343 + 170330344.

It is an arithmetic number, because the mean of its divisors is an integer number (170330344).

Almost surely, 2^340660687 is an apocalyptic number.

340660687 is a deficient number, since it is larger than the sum of its proper divisors (1).

340660687 is an equidigital number, since it uses as much as digits as its factorization.

340660687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 340660687 is about 18456.9956114206. The cubic root of 340660687 is about 698.4049990468.

The spelling of 340660687 in words is "three hundred forty million, six hundred sixty thousand, six hundred eighty-seven".