7309646989 has 2 divisors, whose sum is σ = 7309646990. Its totient is φ = 7309646988.

The previous prime is 7309646873. The next prime is 7309647017. The reversal of 7309646989 is 9896469037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5310036900 + 1999610089 = 72870^2 + 44717^2 .

It is a cyclic number.

It is not a de Polignac number, because 7309646989 - 2²⁵ = 7276092557 is a prime.

It is a super-2 number, since 2×7309646989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7309646089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3654823494 + 3654823495.

It is an arithmetic number, because the mean of its divisors is an integer number (3654823495).

Almost surely, 2^7309646989 is an apocalyptic number.

It is an amenable number.

7309646989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7309646989 is an equidigital number, since it uses as much as digits as its factorization.

7309646989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17635968, while the sum is 61.

The square root of 7309646989 is about 85496.4735471587. The cubic root of 7309646989 is about 1940.7315578948.

The spelling of 7309646989 in words is "seven billion, three hundred nine million, six hundred forty-six thousand, nine hundred eighty-nine".