7390806809 has 2 divisors, whose sum is σ = 7390806810. Its totient is φ = 7390806808.

The previous prime is 7390806781. The next prime is 7390806851. The reversal of 7390806809 is 9086080937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7012387600 + 378419209 = 83740^2 + 19453^2 .

It is a cyclic number.

It is not a de Polignac number, because 7390806809 - 2²⁸ = 7122371353 is a prime.

It is not a weakly prime, because it can be changed into another prime (7390803809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3695403404 + 3695403405.

It is an arithmetic number, because the mean of its divisors is an integer number (3695403405).

Almost surely, 2^7390806809 is an apocalyptic number.

It is an amenable number.

7390806809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7390806809 is an equidigital number, since it uses as much as digits as its factorization.

7390806809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 7390806809 is about 85969.8017271181. The cubic root of 7390806809 is about 1947.8878562953.

The spelling of 7390806809 in words is "seven billion, three hundred ninety million, eight hundred six thousand, eight hundred nine".