515207489 has 2 divisors, whose sum is σ = 515207490. Its totient is φ = 515207488.

The previous prime is 515207471. The next prime is 515207513. The reversal of 515207489 is 984702515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453349264 + 61858225 = 21292^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 515207489 - 2²⁸ = 246772033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (515207089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257603744 + 257603745.

It is an arithmetic number, because the mean of its divisors is an integer number (257603745).

Almost surely, 2^515207489 is an apocalyptic number.

It is an amenable number.

515207489 is a deficient number, since it is larger than the sum of its proper divisors (1).

515207489 is an equidigital number, since it uses as much as digits as its factorization.

515207489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 515207489 is about 22698.1825043328. The cubic root of 515207489 is about 801.6670907848.

The spelling of 515207489 in words is "five hundred fifteen million, two hundred seven thousand, four hundred eighty-nine".