51279929 has 2 divisors, whose sum is σ = 51279930. Its totient is φ = 51279928.

The previous prime is 51279913. The next prime is 51279941. The reversal of 51279929 is 92997215.

It is a happy number.

51279929 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., 41576704 + 9703225 = 6448^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 51279929 - 2⁴ = 51279913 is a prime.

It is a super-2 number, since 2×51279929² = 5259262236490082, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51279929.

It is not a weakly prime, because it can be changed into another prime (51279959) 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, 25639964 + 25639965.

It is an arithmetic number, because the mean of its divisors is an integer number (25639965).

Almost surely, 2^51279929 is an apocalyptic number.

It is an amenable number.

51279929 is a deficient number, since it is larger than the sum of its proper divisors (1).

51279929 is an equidigital number, since it uses as much as digits as its factorization.

51279929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 44.

The square root of 51279929 is about 7161.0005585812. Note that the first 3 decimals coincide. The cubic root of 51279929 is about 371.5202341186.

The spelling of 51279929 in words is "fifty-one million, two hundred seventy-nine thousand, nine hundred twenty-nine".