730806809 has 2 divisors, whose sum is σ = 730806810. Its totient is φ = 730806808.

The previous prime is 730806781. The next prime is 730806847. The reversal of 730806809 is 908608037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714225625 + 16581184 = 26725^2 + 4072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730806809 is a prime.

It is equal to p_37763636 and since 730806809 and 37763636 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (730806889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365403404 + 365403405.

It is an arithmetic number, because the mean of its divisors is an integer number (365403405).

Almost surely, 2^730806809 is an apocalyptic number.

It is an amenable number.

730806809 is a deficient number, since it is larger than the sum of its proper divisors (1).

730806809 is an equidigital number, since it uses as much as digits as its factorization.

730806809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 730806809 is about 27033.4387194822. The cubic root of 730806809 is about 900.7429293585.

The spelling of 730806809 in words is "seven hundred thirty million, eight hundred six thousand, eight hundred nine".