51689767 has 8 divisors (see below), whose sum is σ = 52523424. Its totient is φ = 50859648.

The previous prime is 51689761. The next prime is 51689773. The reversal of 51689767 is 76798615.

51689767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51689761) and next prime (51689773).

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

It is a cyclic number.

It is not a de Polignac number, because 51689767 - 2¹¹ = 51687719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51689767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51689761) 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, 53763 + ... + 54715.

It is an arithmetic number, because the mean of its divisors is an integer number (6565428).

Almost surely, 2^51689767 is an apocalyptic number.

51689767 is a deficient number, since it is larger than the sum of its proper divisors (833657).

51689767 is an equidigital number, since it uses as much as digits as its factorization.

51689767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769.

The product of its digits is 635040, while the sum is 49.

The square root of 51689767 is about 7189.5595831734. The cubic root of 51689767 is about 372.5073601837.

The spelling of 51689767 in words is "fifty-one million, six hundred eighty-nine thousand, seven hundred sixty-seven".