51095689 has 2 divisors, whose sum is σ = 51095690. Its totient is φ = 51095688.

The previous prime is 51095687. The next prime is 51095749. The reversal of 51095689 is 98659015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47610000 + 3485689 = 6900^2 + 1867^2 .

It is a cyclic number.

It is not a de Polignac number, because 51095689 - 2¹ = 51095687 is a prime.

It is a super-2 number, since 2×51095689² = 5221538868769442, which contains 22 as substring.

Together with 51095687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51095687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25547844 + 25547845.

It is an arithmetic number, because the mean of its divisors is an integer number (25547845).

Almost surely, 2^51095689 is an apocalyptic number.

It is an amenable number.

51095689 is a deficient number, since it is larger than the sum of its proper divisors (1).

51095689 is an equidigital number, since it uses as much as digits as its factorization.

51095689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 51095689 is about 7148.1248590102. The cubic root of 51095689 is about 371.0747640076.

The spelling of 51095689 in words is "fifty-one million, ninety-five thousand, six hundred eighty-nine".