928130209 has 2 divisors, whose sum is σ = 928130210. Its totient is φ = 928130208.

The previous prime is 928130101. The next prime is 928130227. The reversal of 928130209 is 902031829.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538936225 + 389193984 = 23215^2 + 19728^2 .

It is a cyclic number.

It is not a de Polignac number, because 928130209 - 2²³ = 919741601 is a prime.

It is a super-2 number, since 2×928130209² = 1722851369716767362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (928130279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464065104 + 464065105.

It is an arithmetic number, because the mean of its divisors is an integer number (464065105).

Almost surely, 2^928130209 is an apocalyptic number.

It is an amenable number.

928130209 is a deficient number, since it is larger than the sum of its proper divisors (1).

928130209 is an equidigital number, since it uses as much as digits as its factorization.

928130209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 928130209 is about 30465.2295084084. The cubic root of 928130209 is about 975.4454099919.

The spelling of 928130209 in words is "nine hundred twenty-eight million, one hundred thirty thousand, two hundred nine".