61686323 has 2 divisors, whose sum is σ = 61686324. Its totient is φ = 61686322.

The previous prime is 61686301. The next prime is 61686337. The reversal of 61686323 is 32368616.

61686323 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 61686323 - 2⁶ = 61686259 is a prime.

It is not a weakly prime, because it can be changed into another prime (61686923) 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, 30843161 + 30843162.

It is an arithmetic number, because the mean of its divisors is an integer number (30843162).

Almost surely, 2^61686323 is an apocalyptic number.

61686323 is a deficient number, since it is larger than the sum of its proper divisors (1).

61686323 is an equidigital number, since it uses as much as digits as its factorization.

61686323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 61686323 is about 7854.0641071995. The cubic root of 61686323 is about 395.1205592583.

The spelling of 61686323 in words is "sixty-one million, six hundred eighty-six thousand, three hundred twenty-three".