51704787 has 4 divisors (see below), whose sum is σ = 68939720. Its totient is φ = 34469856.

The previous prime is 51704773. The next prime is 51704801. The reversal of 51704787 is 78740715.

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

It is an interprime number because it is at equal distance from previous prime (51704773) and next prime (51704801).

It is not a de Polignac number, because 51704787 - 2¹⁹ = 51180499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51704287) 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, 8617462 + ... + 8617467.

It is an arithmetic number, because the mean of its divisors is an integer number (17234930).

Almost surely, 2^51704787 is an apocalyptic number.

51704787 is a deficient number, since it is larger than the sum of its proper divisors (17234933).

51704787 is a wasteful number, since it uses less digits than its factorization.

51704787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17234932.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 51704787 is about 7190.6040775445. The cubic root of 51704787 is about 372.5434377223.

The spelling of 51704787 in words is "fifty-one million, seven hundred four thousand, seven hundred eighty-seven".