616606619 has 2 divisors, whose sum is σ = 616606620. Its totient is φ = 616606618.

The previous prime is 616606603. The next prime is 616606621. The reversal of 616606619 is 916606616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616606619 - 2⁴ = 616606603 is a prime.

It is a super-2 number, since 2×616606619² = 760407445189222322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 616606621, 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 (616606649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308303309 + 308303310.

It is an arithmetic number, because the mean of its divisors is an integer number (308303310).

Almost surely, 2^616606619 is an apocalyptic number.

616606619 is a deficient number, since it is larger than the sum of its proper divisors (1).

616606619 is an equidigital number, since it uses as much as digits as its factorization.

616606619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 616606619 is about 24831.5649728325. The cubic root of 616606619 is about 851.1433835405.

The spelling of 616606619 in words is "six hundred sixteen million, six hundred six thousand, six hundred nineteen".