617222819 has 2 divisors, whose sum is σ = 617222820. Its totient is φ = 617222818.

The previous prime is 617222713. The next prime is 617222821. The reversal of 617222819 is 918222716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 617222819 - 2²⁰ = 616174243 is a prime.

It is a super-2 number, since 2×617222819² = 761928016588613522, which contains 22 as substring.

Together with 617222821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (617222849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308611409 + 308611410.

It is an arithmetic number, because the mean of its divisors is an integer number (308611410).

Almost surely, 2^617222819 is an apocalyptic number.

617222819 is a deficient number, since it is larger than the sum of its proper divisors (1).

617222819 is an equidigital number, since it uses as much as digits as its factorization.

617222819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 617222819 is about 24843.9694694709. The cubic root of 617222819 is about 851.4268165129.

The spelling of 617222819 in words is "six hundred seventeen million, two hundred twenty-two thousand, eight hundred nineteen".