617772241 has 2 divisors, whose sum is σ = 617772242. Its totient is φ = 617772240.

The previous prime is 617772191. The next prime is 617772263. The reversal of 617772241 is 142277716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589469841 + 28302400 = 24279^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 617772241 - 2⁹ = 617771729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 617772241.

It is not a weakly prime, because it can be changed into another prime (617772641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308886120 + 308886121.

It is an arithmetic number, because the mean of its divisors is an integer number (308886121).

Almost surely, 2^617772241 is an apocalyptic number.

It is an amenable number.

617772241 is a deficient number, since it is larger than the sum of its proper divisors (1).

617772241 is an equidigital number, since it uses as much as digits as its factorization.

617772241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 37.

The square root of 617772241 is about 24855.0244618669. The cubic root of 617772241 is about 851.6793746255.

The spelling of 617772241 in words is "six hundred seventeen million, seven hundred seventy-two thousand, two hundred forty-one".