51776939 has 8 divisors (see below), whose sum is σ = 53352000. Its totient is φ = 50221696.

The previous prime is 51776927. The next prime is 51776947. The reversal of 51776939 is 93967715.

It is a happy number.

51776939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51776939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51776893 and 51776902.

It is not an unprimeable number, because it can be changed into a prime (51776639) 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, 437 + ... + 10185.

It is an arithmetic number, because the mean of its divisors is an integer number (6669000).

Almost surely, 2^51776939 is an apocalyptic number.

51776939 is a deficient number, since it is larger than the sum of its proper divisors (1575061).

51776939 is a wasteful number, since it uses less digits than its factorization.

51776939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9909.

The product of its digits is 357210, while the sum is 47.

The square root of 51776939 is about 7195.6194312929. The cubic root of 51776939 is about 372.7166470913.

The spelling of 51776939 in words is "fifty-one million, seven hundred seventy-six thousand, nine hundred thirty-nine".