616334861 has 2 divisors, whose sum is σ = 616334862. Its totient is φ = 616334860.

The previous prime is 616334857. The next prime is 616334869. The reversal of 616334861 is 168433616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383924836 + 232410025 = 19594^2 + 15245^2 .

It is a cyclic number.

It is not a de Polignac number, because 616334861 - 2² = 616334857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616334869) 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, 308167430 + 308167431.

It is an arithmetic number, because the mean of its divisors is an integer number (308167431).

Almost surely, 2^616334861 is an apocalyptic number.

It is an amenable number.

616334861 is a deficient number, since it is larger than the sum of its proper divisors (1).

616334861 is an equidigital number, since it uses as much as digits as its factorization.

616334861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 616334861 is about 24826.0923425335. The cubic root of 616334861 is about 851.0183232477.

The spelling of 616334861 in words is "six hundred sixteen million, three hundred thirty-four thousand, eight hundred sixty-one".