53981686 has 8 divisors (see below), whose sum is σ = 88333704. Its totient is φ = 24537120.

The previous prime is 53981651. The next prime is 53981687. The reversal of 53981686 is 68618935.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53981687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226835 + ... + 1226878.

It is an arithmetic number, because the mean of its divisors is an integer number (11041713).

Almost surely, 2^53981686 is an apocalyptic number.

53981686 is a deficient number, since it is larger than the sum of its proper divisors (34352018).

53981686 is a wasteful number, since it uses less digits than its factorization.

53981686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453726.

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

The square root of 53981686 is about 7347.2230128124. The cubic root of 53981686 is about 377.9335801479.

The spelling of 53981686 in words is "fifty-three million, nine hundred eighty-one thousand, six hundred eighty-six".