616206091 has 2 divisors, whose sum is σ = 616206092. Its totient is φ = 616206090.

The previous prime is 616206023. The next prime is 616206109. The reversal of 616206091 is 190602616.

616206091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (616206109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616206091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (616206391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308103045 + 308103046.

It is an arithmetic number, because the mean of its divisors is an integer number (308103046).

Almost surely, 2^616206091 is an apocalyptic number.

616206091 is a deficient number, since it is larger than the sum of its proper divisors (1).

616206091 is an equidigital number, since it uses as much as digits as its factorization.

616206091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 616206091 is about 24823.4987662900. The cubic root of 616206091 is about 850.9590517546.

The spelling of 616206091 in words is "six hundred sixteen million, two hundred six thousand, ninety-one".