51756979 has 2 divisors, whose sum is σ = 51756980. Its totient is φ = 51756978.

The previous prime is 51756889. The next prime is 51757001. The reversal of 51756979 is 97965715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51756979 - 2¹³ = 51748787 is a prime.

It is not a weakly prime, because it can be changed into another prime (51754979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25878489 + 25878490.

It is an arithmetic number, because the mean of its divisors is an integer number (25878490).

Almost surely, 2^51756979 is an apocalyptic number.

51756979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51756979 is an equidigital number, since it uses as much as digits as its factorization.

51756979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 49.

The square root of 51756979 is about 7194.2323426478. The cubic root of 51756979 is about 372.6687468704.

The spelling of 51756979 in words is "fifty-one million, seven hundred fifty-six thousand, nine hundred seventy-nine".