617520089 has 2 divisors, whose sum is σ = 617520090. Its totient is φ = 617520088.

The previous prime is 617520049. The next prime is 617520091. The reversal of 617520089 is 980025716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569633689 + 47886400 = 23867^2 + 6920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617520089 is a prime.

It is a Sophie Germain prime.

Together with 617520091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (617520049) 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, 308760044 + 308760045.

It is an arithmetic number, because the mean of its divisors is an integer number (308760045).

Almost surely, 2^617520089 is an apocalyptic number.

It is an amenable number.

617520089 is a deficient number, since it is larger than the sum of its proper divisors (1).

617520089 is an equidigital number, since it uses as much as digits as its factorization.

617520089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 617520089 is about 24849.9514888863. The cubic root of 617520089 is about 851.5634840820.

The spelling of 617520089 in words is "six hundred seventeen million, five hundred twenty thousand, eighty-nine".