519672409 has 2 divisors, whose sum is σ = 519672410. Its totient is φ = 519672408.

The previous prime is 519672353. The next prime is 519672421. The reversal of 519672409 is 904276915.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 517790025 + 1882384 = 22755^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 519672409 - 2⁹ = 519671897 is a prime.

It is not a weakly prime, because it can be changed into another prime (519672449) 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, 259836204 + 259836205.

It is an arithmetic number, because the mean of its divisors is an integer number (259836205).

Almost surely, 2^519672409 is an apocalyptic number.

It is an amenable number.

519672409 is a deficient number, since it is larger than the sum of its proper divisors (1).

519672409 is an equidigital number, since it uses as much as digits as its factorization.

519672409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 519672409 is about 22796.3244625093. The cubic root of 519672409 is about 803.9762504020.

The spelling of 519672409 in words is "five hundred nineteen million, six hundred seventy-two thousand, four hundred nine".