51782693 has 2 divisors, whose sum is σ = 51782694. Its totient is φ = 51782692.

The previous prime is 51782681. The next prime is 51782699. The reversal of 51782693 is 39628715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31550689 + 20232004 = 5617^2 + 4498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51782693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51782693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51782699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25891346 + 25891347.

It is an arithmetic number, because the mean of its divisors is an integer number (25891347).

Almost surely, 2^51782693 is an apocalyptic number.

It is an amenable number.

51782693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51782693 is an equidigital number, since it uses as much as digits as its factorization.

51782693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 51782693 is about 7196.0192467780. The cubic root of 51782693 is about 372.7304533159.

The spelling of 51782693 in words is "fifty-one million, seven hundred eighty-two thousand, six hundred ninety-three".