51748973 has 2 divisors, whose sum is σ = 51748974. Its totient is φ = 51748972.

The previous prime is 51748943. The next prime is 51748987. The reversal of 51748973 is 37984715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31561924 + 20187049 = 5618^2 + 4493^2 .

It is a cyclic number.

It is not a de Polignac number, because 51748973 - 2⁸ = 51748717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51748943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25874486 + 25874487.

It is an arithmetic number, because the mean of its divisors is an integer number (25874487).

Almost surely, 2^51748973 is an apocalyptic number.

It is an amenable number.

51748973 is a deficient number, since it is larger than the sum of its proper divisors (1).

51748973 is an equidigital number, since it uses as much as digits as its factorization.

51748973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 51748973 is about 7193.6759031805. The cubic root of 51748973 is about 372.6495305258.

The spelling of 51748973 in words is "fifty-one million, seven hundred forty-eight thousand, nine hundred seventy-three".