51759787 has 4 divisors (see below), whose sum is σ = 51859656. Its totient is φ = 51659920.

The previous prime is 51759779. The next prime is 51759793. The reversal of 51759787 is 78795715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78795715 = 5 ⋅15759143.

It is a cyclic number.

It is not a de Polignac number, because 51759787 - 2³ = 51759779 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 51759787.

It is not an unprimeable number, because it can be changed into a prime (51759727) 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, 49153 + ... + 50194.

It is an arithmetic number, because the mean of its divisors is an integer number (12964914).

Almost surely, 2^51759787 is an apocalyptic number.

51759787 is a deficient number, since it is larger than the sum of its proper divisors (99869).

51759787 is an equidigital number, since it uses as much as digits as its factorization.

51759787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99868.

The product of its digits is 617400, while the sum is 49.

The square root of 51759787 is about 7194.4274963335. The cubic root of 51759787 is about 372.6754862831.

The spelling of 51759787 in words is "fifty-one million, seven hundred fifty-nine thousand, seven hundred eighty-seven".