730427809 has 2 divisors, whose sum is σ = 730427810. Its totient is φ = 730427808.

The previous prime is 730427807. The next prime is 730427837. The reversal of 730427809 is 908724037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723771409 + 6656400 = 26903^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 730427809 - 2¹ = 730427807 is a prime.

Together with 730427807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (730427801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365213904 + 365213905.

It is an arithmetic number, because the mean of its divisors is an integer number (365213905).

Almost surely, 2^730427809 is an apocalyptic number.

It is an amenable number.

730427809 is a deficient number, since it is larger than the sum of its proper divisors (1).

730427809 is an equidigital number, since it uses as much as digits as its factorization.

730427809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 730427809 is about 27026.4279733745. The cubic root of 730427809 is about 900.5871925312.

The spelling of 730427809 in words is "seven hundred thirty million, four hundred twenty-seven thousand, eight hundred nine".