51369797 has 2 divisors, whose sum is σ = 51369798. Its totient is φ = 51369796.

The previous prime is 51369781. The next prime is 51369823. The reversal of 51369797 is 79796315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34975396 + 16394401 = 5914^2 + 4049^2 .

It is a cyclic number.

It is not a de Polignac number, because 51369797 - 2⁴ = 51369781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51369757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25684898 + 25684899.

It is an arithmetic number, because the mean of its divisors is an integer number (25684899).

Almost surely, 2^51369797 is an apocalyptic number.

It is an amenable number.

51369797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51369797 is an equidigital number, since it uses as much as digits as its factorization.

51369797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 47.

The square root of 51369797 is about 7167.2726332964. The cubic root of 51369797 is about 371.7371370148.

The spelling of 51369797 in words is "fifty-one million, three hundred sixty-nine thousand, seven hundred ninety-seven".