51729087 has 8 divisors (see below), whose sum is σ = 69282304. Its totient is φ = 34330968.

The previous prime is 51729059. The next prime is 51729089. The reversal of 51729087 is 78092715.

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

It is not a de Polignac number, because 51729087 - 2¹⁵ = 51696319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51729089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37993 + ... + 39330.

It is an arithmetic number, because the mean of its divisors is an integer number (8660288).

Almost surely, 2^51729087 is an apocalyptic number.

51729087 is a deficient number, since it is larger than the sum of its proper divisors (17553217).

51729087 is a wasteful number, since it uses less digits than its factorization.

51729087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77549.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 51729087 is about 7192.2935841079. The cubic root of 51729087 is about 372.6017907185.

The spelling of 51729087 in words is "fifty-one million, seven hundred twenty-nine thousand, eighty-seven".