616636331 has 2 divisors, whose sum is σ = 616636332. Its totient is φ = 616636330.

The previous prime is 616636327. The next prime is 616636333. The reversal of 616636331 is 133636616.

616636331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616636331 - 2² = 616636327 is a prime.

It is a super-2 number, since 2×616636331² = 760480729418283122, which contains 22 as substring.

Together with 616636333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 616636291 and 616636300.

It is not a weakly prime, because it can be changed into another prime (616636333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308318165 + 308318166.

It is an arithmetic number, because the mean of its divisors is an integer number (308318166).

Almost surely, 2^616636331 is an apocalyptic number.

616636331 is a deficient number, since it is larger than the sum of its proper divisors (1).

616636331 is an equidigital number, since it uses as much as digits as its factorization.

616636331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 616636331 is about 24832.1632364158. The cubic root of 616636331 is about 851.1570544750.

The spelling of 616636331 in words is "six hundred sixteen million, six hundred thirty-six thousand, three hundred thirty-one".