61636973 has 2 divisors, whose sum is σ = 61636974. Its totient is φ = 61636972.

The previous prime is 61636957. The next prime is 61636997. The reversal of 61636973 is 37963616.

61636973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 27741289 = 5822^2 + 5267^2 .

It is a cyclic number.

It is not a de Polignac number, because 61636973 - 2⁴ = 61636957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61636973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61636903) 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, 30818486 + 30818487.

It is an arithmetic number, because the mean of its divisors is an integer number (30818487).

Almost surely, 2^61636973 is an apocalyptic number.

It is an amenable number.

61636973 is a deficient number, since it is larger than the sum of its proper divisors (1).

61636973 is an equidigital number, since it uses as much as digits as its factorization.

61636973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 41.

The square root of 61636973 is about 7850.9217930126. The cubic root of 61636973 is about 395.0151636544.

The spelling of 61636973 in words is "sixty-one million, six hundred thirty-six thousand, nine hundred seventy-three".