207682681 has 2 divisors, whose sum is σ = 207682682. Its totient is φ = 207682680.

The previous prime is 207682667. The next prime is 207682687. The reversal of 207682681 is 186286702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206899456 + 783225 = 14384^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 207682681 - 2⁵ = 207682649 is a prime.

It is a super-2 number, since 2×207682681² = 86264191974695522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (207682687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103841340 + 103841341.

It is an arithmetic number, because the mean of its divisors is an integer number (103841341).

Almost surely, 2^207682681 is an apocalyptic number.

It is an amenable number.

207682681 is a deficient number, since it is larger than the sum of its proper divisors (1).

207682681 is an equidigital number, since it uses as much as digits as its factorization.

207682681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 207682681 is about 14411.1998459531. The cubic root of 207682681 is about 592.1977602402.

The spelling of 207682681 in words is "two hundred seven million, six hundred eighty-two thousand, six hundred eighty-one".