61968385 has 4 divisors (see below), whose sum is σ = 74362068. Its totient is φ = 49574704.

The previous prime is 61968373. The next prime is 61968397. The reversal of 61968385 is 58386916.

It is a Cunningham number, because it is equal to 7872²+1.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61968373) and next prime (61968397).

It can be written as a sum of positive squares in 2 ways, for example, as 22316176 + 39652209 = 4724^2 + 6297^2 .

It is a cyclic number.

It is not a de Polignac number, because 61968385 - 2¹¹ = 61966337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6196834 + ... + 6196843.

It is an arithmetic number, because the mean of its divisors is an integer number (18590517).

Almost surely, 2^61968385 is an apocalyptic number.

It is an amenable number.

61968385 is a deficient number, since it is larger than the sum of its proper divisors (12393683).

61968385 is a wasteful number, since it uses less digits than its factorization.

61968385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12393682.

The product of its digits is 311040, while the sum is 46.

The square root of 61968385 is about 7872.0000635163. Note that the first 4 decimals coincide. The cubic root of 61968385 is about 395.7218760122.

The spelling of 61968385 in words is "sixty-one million, nine hundred sixty-eight thousand, three hundred eighty-five".