172807513 has 2 divisors, whose sum is σ = 172807514. Its totient is φ = 172807512.

The previous prime is 172807511. The next prime is 172807559. The reversal of 172807513 is 315708271.

172807513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107391769 + 65415744 = 10363^2 + 8088^2 .

It is an emirp because it is prime and its reverse (315708271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172807513 - 2¹ = 172807511 is a prime.

Together with 172807511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (172807511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86403756 + 86403757.

It is an arithmetic number, because the mean of its divisors is an integer number (86403757).

Almost surely, 2^172807513 is an apocalyptic number.

It is an amenable number.

172807513 is a deficient number, since it is larger than the sum of its proper divisors (1).

172807513 is an equidigital number, since it uses as much as digits as its factorization.

172807513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 172807513 is about 13145.6271436550. The cubic root of 172807513 is about 556.9987321982.

The spelling of 172807513 in words is "one hundred seventy-two million, eight hundred seven thousand, five hundred thirteen".