51972797 has 2 divisors, whose sum is σ = 51972798. Its totient is φ = 51972796.

The previous prime is 51972773. The next prime is 51972799. The reversal of 51972797 is 79727915.

51972797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26429881 + 25542916 = 5141^2 + 5054^2 .

It is a cyclic number.

It is not a de Polignac number, because 51972797 - 2¹² = 51968701 is a prime.

Together with 51972799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51972799) 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, 25986398 + 25986399.

It is an arithmetic number, because the mean of its divisors is an integer number (25986399).

Almost surely, 2^51972797 is an apocalyptic number.

It is an amenable number.

51972797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51972797 is an equidigital number, since it uses as much as digits as its factorization.

51972797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277830, while the sum is 47.

The square root of 51972797 is about 7209.2161155010. The cubic root of 51972797 is about 373.1860174691.

The spelling of 51972797 in words is "fifty-one million, nine hundred seventy-two thousand, seven hundred ninety-seven".