340673681 has 2 divisors, whose sum is σ = 340673682. Its totient is φ = 340673680.

The previous prime is 340673639. The next prime is 340673717. The reversal of 340673681 is 186376043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313467025 + 27206656 = 17705^2 + 5216^2 .

It is a cyclic number.

It is not a de Polignac number, because 340673681 - 2¹⁴ = 340657297 is a prime.

It is a super-2 number, since 2×340673681² = 232117113852179522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (340673381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170336840 + 170336841.

It is an arithmetic number, because the mean of its divisors is an integer number (170336841).

Almost surely, 2^340673681 is an apocalyptic number.

It is an amenable number.

340673681 is a deficient number, since it is larger than the sum of its proper divisors (1).

340673681 is an equidigital number, since it uses as much as digits as its factorization.

340673681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 340673681 is about 18457.3476155162. The cubic root of 340673681 is about 698.4138788105.

The spelling of 340673681 in words is "three hundred forty million, six hundred seventy-three thousand, six hundred eighty-one".