51695797 has 2 divisors, whose sum is σ = 51695798. Its totient is φ = 51695796.

The previous prime is 51695773. The next prime is 51695821. The reversal of 51695797 is 79759615.

It is a balanced prime because it is at equal distance from previous prime (51695773) and next prime (51695821).

It can be written as a sum of positive squares in only one way, i.e., 41873841 + 9821956 = 6471^2 + 3134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51695797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51695797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51695747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25847898 + 25847899.

It is an arithmetic number, because the mean of its divisors is an integer number (25847899).

Almost surely, 2^51695797 is an apocalyptic number.

It is an amenable number.

51695797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51695797 is an equidigital number, since it uses as much as digits as its factorization.

51695797 is an evil number, because the sum of its binary digits is even.

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

The square root of 51695797 is about 7189.9789290373. The cubic root of 51695797 is about 372.5218448820.

The spelling of 51695797 in words is "fifty-one million, six hundred ninety-five thousand, seven hundred ninety-seven".