340708681 has 2 divisors, whose sum is σ = 340708682. Its totient is φ = 340708680.

The previous prime is 340708649. The next prime is 340708759. The reversal of 340708681 is 186807043.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247779081 + 92929600 = 15741^2 + 9640^2 .

It is a cyclic number.

It is not a de Polignac number, because 340708681 - 2⁵ = 340708649 is a prime.

It is a super-2 number, since 2×340708681² = 232164810617519522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 340708681.

It is not a weakly prime, because it can be changed into another prime (340708981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170354340 + 170354341.

It is an arithmetic number, because the mean of its divisors is an integer number (170354341).

Almost surely, 2^340708681 is an apocalyptic number.

It is an amenable number.

340708681 is a deficient number, since it is larger than the sum of its proper divisors (1).

340708681 is an equidigital number, since it uses as much as digits as its factorization.

340708681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 340708681 is about 18458.2957230618. The cubic root of 340708681 is about 698.4377957825.

The spelling of 340708681 in words is "three hundred forty million, seven hundred eight thousand, six hundred eighty-one".