7109681 has 2 divisors, whose sum is σ = 7109682. Its totient is φ = 7109680.

The previous prime is 7109671. The next prime is 7109731. The reversal of 7109681 is 1869017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5569600 + 1540081 = 2360^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 7109681 - 2¹⁴ = 7093297 is a prime.

It is a super-2 number, since 2×7109681² = 101095127843522, 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 (7109671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3554840 + 3554841.

It is an arithmetic number, because the mean of its divisors is an integer number (3554841).

Almost surely, 2^7109681 is an apocalyptic number.

It is an amenable number.

7109681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7109681 is an equidigital number, since it uses as much as digits as its factorization.

7109681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 7109681 is about 2666.3985073503. The cubic root of 7109681 is about 192.2870507363.

It can be divided in two parts, 7 and 109681, that multiplied together give a palindrome (767767).

The spelling of 7109681 in words is "seven million, one hundred nine thousand, six hundred eighty-one".