34640681 has 2 divisors, whose sum is σ = 34640682. Its totient is φ = 34640680.

The previous prime is 34640657. The next prime is 34640699. The reversal of 34640681 is 18604643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29800681 + 4840000 = 5459^2 + 2200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34640681 is a prime.

It is a super-2 number, since 2×34640681² = 2399953560287522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (34640381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17320340 + 17320341.

It is an arithmetic number, because the mean of its divisors is an integer number (17320341).

Almost surely, 2^34640681 is an apocalyptic number.

It is an amenable number.

34640681 is a deficient number, since it is larger than the sum of its proper divisors (1).

34640681 is an equidigital number, since it uses as much as digits as its factorization.

34640681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 34640681 is about 5885.6334408456. The cubic root of 34640681 is about 325.9833914532.

The spelling of 34640681 in words is "thirty-four million, six hundred forty thousand, six hundred eighty-one".