51997873 has 2 divisors, whose sum is σ = 51997874. Its totient is φ = 51997872.

The previous prime is 51997853. The next prime is 51997901. The reversal of 51997873 is 37879915.

51997873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36881329 + 15116544 = 6073^2 + 3888^2 .

It is a cyclic number.

It is not a de Polignac number, because 51997873 - 2²⁵ = 18443441 is a prime.

It is not a weakly prime, because it can be changed into another prime (51997853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25998936 + 25998937.

It is an arithmetic number, because the mean of its divisors is an integer number (25998937).

Almost surely, 2^51997873 is an apocalyptic number.

It is an amenable number.

51997873 is a deficient number, since it is larger than the sum of its proper divisors (1).

51997873 is an equidigital number, since it uses as much as digits as its factorization.

51997873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The square root of 51997873 is about 7210.9550685051. The cubic root of 51997873 is about 373.2460264769.

The spelling of 51997873 in words is "fifty-one million, nine hundred ninety-seven thousand, eight hundred seventy-three".