53936681 has 4 divisors (see below), whose sum is σ = 54219264. Its totient is φ = 53654100.

The previous prime is 53936647. The next prime is 53936693. The reversal of 53936681 is 18663935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53936681 - 2¹⁰ = 53935657 is a prime.

It is a super-2 number, since 2×53936681² = 5818331114591522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53933681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141005 + ... + 141386.

It is an arithmetic number, because the mean of its divisors is an integer number (13554816).

Almost surely, 2^53936681 is an apocalyptic number.

It is an amenable number.

53936681 is a deficient number, since it is larger than the sum of its proper divisors (282583).

53936681 is a wasteful number, since it uses less digits than its factorization.

53936681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282582.

The product of its digits is 116640, while the sum is 41.

The square root of 53936681 is about 7344.1596524041. The cubic root of 53936681 is about 377.8285221115.

The spelling of 53936681 in words is "fifty-three million, nine hundred thirty-six thousand, six hundred eighty-one".