51797787 has 4 divisors (see below), whose sum is σ = 69063720. Its totient is φ = 34531856.

The previous prime is 51797747. The next prime is 51797789. The reversal of 51797787 is 78779715.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51797787 - 2⁷ = 51797659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51797789) 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, 8632962 + ... + 8632967.

It is an arithmetic number, because the mean of its divisors is an integer number (17265930).

Almost surely, 2^51797787 is an apocalyptic number.

51797787 is a deficient number, since it is larger than the sum of its proper divisors (17265933).

51797787 is a wasteful number, since it uses less digits than its factorization.

51797787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17265932.

The product of its digits is 864360, while the sum is 51.

The square root of 51797787 is about 7197.0679446564. The cubic root of 51797787 is about 372.7666652019.

The spelling of 51797787 in words is "fifty-one million, seven hundred ninety-seven thousand, seven hundred eighty-seven".