51747691 has 2 divisors, whose sum is σ = 51747692. Its totient is φ = 51747690.

The previous prime is 51747673. The next prime is 51747701. The reversal of 51747691 is 19674715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51747691 - 2¹¹ = 51745643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51747391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25873845 + 25873846.

It is an arithmetic number, because the mean of its divisors is an integer number (25873846).

Almost surely, 2^51747691 is an apocalyptic number.

51747691 is a deficient number, since it is larger than the sum of its proper divisors (1).

51747691 is an equidigital number, since it uses as much as digits as its factorization.

51747691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 51747691 is about 7193.5867965849. The cubic root of 51747691 is about 372.6464532303.

The spelling of 51747691 in words is "fifty-one million, seven hundred forty-seven thousand, six hundred ninety-one".