7309688861 has 2 divisors, whose sum is σ = 7309688862. Its totient is φ = 7309688860.

The previous prime is 7309688851. The next prime is 7309688879. The reversal of 7309688861 is 1688869037.

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., 6311508025 + 998180836 = 79445^2 + 31594^2 .

It is a cyclic number.

It is not a de Polignac number, because 7309688861 - 2¹⁸ = 7309426717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7309688797 and 7309688806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7309688831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3654844430 + 3654844431.

It is an arithmetic number, because the mean of its divisors is an integer number (3654844431).

Almost surely, 2^7309688861 is an apocalyptic number.

It is an amenable number.

7309688861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7309688861 is an equidigital number, since it uses as much as digits as its factorization.

7309688861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The square root of 7309688861 is about 85496.7184224050. The cubic root of 7309688861 is about 1940.7352635985.

The spelling of 7309688861 in words is "seven billion, three hundred nine million, six hundred eighty-eight thousand, eight hundred sixty-one".