51129479 has 2 divisors, whose sum is σ = 51129480. Its totient is φ = 51129478.

The previous prime is 51129473. The next prime is 51129493. The reversal of 51129479 is 97492115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51129479 - 2¹² = 51125383 is a prime.

It is a super-2 number, since 2×51129479² = 5228447245622882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51129473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25564739 + 25564740.

It is an arithmetic number, because the mean of its divisors is an integer number (25564740).

Almost surely, 2^51129479 is an apocalyptic number.

51129479 is a deficient number, since it is larger than the sum of its proper divisors (1).

51129479 is an equidigital number, since it uses as much as digits as its factorization.

51129479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 51129479 is about 7150.4880253029. The cubic root of 51129479 is about 371.1565442489.

The spelling of 51129479 in words is "fifty-one million, one hundred twenty-nine thousand, four hundred seventy-nine".