51693693 has 8 divisors (see below), whose sum is σ = 68967168. Its totient is φ = 34441344.

The previous prime is 51693679. The next prime is 51693703. The reversal of 51693693 is 39639615.

51693693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51693693 - 2⁸ = 51693437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51693193) 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 in 7 ways as a sum of consecutive naturals, for example, 1780 + ... + 10322.

It is an arithmetic number, because the mean of its divisors is an integer number (8620896).

Almost surely, 2^51693693 is an apocalyptic number.

It is an amenable number.

51693693 is a deficient number, since it is larger than the sum of its proper divisors (17273475).

51693693 is a wasteful number, since it uses less digits than its factorization.

51693693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10563.

The product of its digits is 131220, while the sum is 42.

The square root of 51693693 is about 7189.8326127943. The cubic root of 51693693 is about 372.5167909792.

The spelling of 51693693 in words is "fifty-one million, six hundred ninety-three thousand, six hundred ninety-three".