616636847 has 2 divisors, whose sum is σ = 616636848. Its totient is φ = 616636846.

The previous prime is 616636793. The next prime is 616636873. The reversal of 616636847 is 748636616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616636847 - 2⁸ = 616636591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616636897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308318423 + 308318424.

It is an arithmetic number, because the mean of its divisors is an integer number (308318424).

Almost surely, 2^616636847 is an apocalyptic number.

616636847 is a deficient number, since it is larger than the sum of its proper divisors (1).

616636847 is an equidigital number, since it uses as much as digits as its factorization.

616636847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 47.

The square root of 616636847 is about 24832.1736261649. The cubic root of 616636847 is about 851.1572918904.

The spelling of 616636847 in words is "six hundred sixteen million, six hundred thirty-six thousand, eight hundred forty-seven".