340635689 has 2 divisors, whose sum is σ = 340635690. Its totient is φ = 340635688.

The previous prime is 340635683. The next prime is 340635797. The reversal of 340635689 is 986536043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203347600 + 137288089 = 14260^2 + 11717^2 .

It is a cyclic number.

It is not a de Polignac number, because 340635689 - 2⁸ = 340635433 is a prime.

It is not a weakly prime, because it can be changed into another prime (340635683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170317844 + 170317845.

It is an arithmetic number, because the mean of its divisors is an integer number (170317845).

Almost surely, 2^340635689 is an apocalyptic number.

It is an amenable number.

340635689 is a deficient number, since it is larger than the sum of its proper divisors (1).

340635689 is an equidigital number, since it uses as much as digits as its factorization.

340635689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 340635689 is about 18456.3184031919. The cubic root of 340635689 is about 698.3879154248.

The spelling of 340635689 in words is "three hundred forty million, six hundred thirty-five thousand, six hundred eighty-nine".