616139 has 2 divisors, whose sum is σ = 616140. Its totient is φ = 616138.

The previous prime is 616129. The next prime is 616141. The reversal of 616139 is 931616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616139 - 2⁸ = 615883 is a prime.

Together with 616141, 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 (616129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308069 + 308070.

It is an arithmetic number, because the mean of its divisors is an integer number (308070).

2⁶¹⁶¹³⁹ is an apocalyptic number.

616139 is a deficient number, since it is larger than the sum of its proper divisors (1).

616139 is an equidigital number, since it uses as much as digits as its factorization.

616139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 616139 is about 784.9452210186. The cubic root of 616139 is about 85.0928167193.

The spelling of 616139 in words is "six hundred sixteen thousand, one hundred thirty-nine".