617717213 has 4 divisors (see below), whose sum is σ = 617810460. Its totient is φ = 617623968.

The previous prime is 617717209. The next prime is 617717237. The reversal of 617717213 is 312717716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426918244 + 190798969 = 20662^2 + 13813^2 .

It is a cyclic number.

It is not a de Polignac number, because 617717213 - 2² = 617717209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617717413) 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 in 3 ways as a sum of consecutive naturals, for example, 35858 + ... + 50211.

It is an arithmetic number, because the mean of its divisors is an integer number (154452615).

Almost surely, 2^617717213 is an apocalyptic number.

It is an amenable number.

617717213 is a deficient number, since it is larger than the sum of its proper divisors (93247).

617717213 is an equidigital number, since it uses as much as digits as its factorization.

617717213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93246.

The product of its digits is 12348, while the sum is 35.

The square root of 617717213 is about 24853.9174578174. The cubic root of 617717213 is about 851.6540861232.

The spelling of 617717213 in words is "six hundred seventeen million, seven hundred seventeen thousand, two hundred thirteen".