51879757 has 2 divisors, whose sum is σ = 51879758. Its totient is φ = 51879756.

The previous prime is 51879727. The next prime is 51879781. The reversal of 51879757 is 75797815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 4076361 = 6914^2 + 2019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51879757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51879757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51879727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25939878 + 25939879.

It is an arithmetic number, because the mean of its divisors is an integer number (25939879).

Almost surely, 2^51879757 is an apocalyptic number.

It is an amenable number.

51879757 is a deficient number, since it is larger than the sum of its proper divisors (1).

51879757 is an equidigital number, since it uses as much as digits as its factorization.

51879757 is an evil number, because the sum of its binary digits is even.

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

The square root of 51879757 is about 7202.7603736345. The cubic root of 51879757 is about 372.9631959892.

The spelling of 51879757 in words is "fifty-one million, eight hundred seventy-nine thousand, seven hundred fifty-seven".