617520023 has 2 divisors, whose sum is σ = 617520024. Its totient is φ = 617520022.

The previous prime is 617520017. The next prime is 617520041. The reversal of 617520023 is 320025716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617520023 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 617519974 and 617520001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617520623) 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, 308760011 + 308760012.

It is an arithmetic number, because the mean of its divisors is an integer number (308760012).

Almost surely, 2^617520023 is an apocalyptic number.

617520023 is a deficient number, since it is larger than the sum of its proper divisors (1).

617520023 is an equidigital number, since it uses as much as digits as its factorization.

617520023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 617520023 is about 24849.9501609158. The cubic root of 617520023 is about 851.5634537439.

Adding to 617520023 its reverse (320025716), we get a palindrome (937545739).

The spelling of 617520023 in words is "six hundred seventeen million, five hundred twenty thousand, twenty-three".