507928409 has 2 divisors, whose sum is σ = 507928410. Its totient is φ = 507928408.

The previous prime is 507928403. The next prime is 507928423. The reversal of 507928409 is 904829705.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491952400 + 15976009 = 22180^2 + 3997^2 .

It is a cyclic number.

It is not a de Polignac number, because 507928409 - 2²⁰ = 506879833 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 507928409.

It is not a weakly prime, because it can be changed into another prime (507928403) 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, 253964204 + 253964205.

It is an arithmetic number, because the mean of its divisors is an integer number (253964205).

Almost surely, 2^507928409 is an apocalyptic number.

It is an amenable number.

507928409 is a deficient number, since it is larger than the sum of its proper divisors (1).

507928409 is an equidigital number, since it uses as much as digits as its factorization.

507928409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 507928409 is about 22537.2671147147. The cubic root of 507928409 is about 797.8737334323.

The spelling of 507928409 in words is "five hundred seven million, nine hundred twenty-eight thousand, four hundred nine".