51704717 has 4 divisors (see below), whose sum is σ = 51723420. Its totient is φ = 51686016.

The previous prime is 51704693. The next prime is 51704753. The reversal of 51704717 is 71740715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31147561 + 20557156 = 5581^2 + 4534^2 .

It is a cyclic number.

It is not a de Polignac number, because 51704717 - 2²² = 47510413 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 (51704417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4292 + ... + 11037.

It is an arithmetic number, because the mean of its divisors is an integer number (12930855).

Almost surely, 2^51704717 is an apocalyptic number.

It is an amenable number.

51704717 is a deficient number, since it is larger than the sum of its proper divisors (18703).

51704717 is a wasteful number, since it uses less digits than its factorization.

51704717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18702.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 51704717 is about 7190.5992100798. The cubic root of 51704717 is about 372.5432696009.

The spelling of 51704717 in words is "fifty-one million, seven hundred four thousand, seven hundred seventeen".