51123379 has 2 divisors, whose sum is σ = 51123380. Its totient is φ = 51123378.

The previous prime is 51123377. The next prime is 51123383. The reversal of 51123379 is 97332115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51123379 - 2¹ = 51123377 is a prime.

It is a super-2 number, since 2×51123379² = 5227199760755282, which contains 22 as substring.

Together with 51123377, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51123379.

It is not a weakly prime, because it can be changed into another prime (51123377) 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, 25561689 + 25561690.

It is an arithmetic number, because the mean of its divisors is an integer number (25561690).

Almost surely, 2^51123379 is an apocalyptic number.

51123379 is a deficient number, since it is larger than the sum of its proper divisors (1).

51123379 is an equidigital number, since it uses as much as digits as its factorization.

51123379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 31.

The square root of 51123379 is about 7150.0614682672. The cubic root of 51123379 is about 371.1417833907.

The spelling of 51123379 in words is "fifty-one million, one hundred twenty-three thousand, three hundred seventy-nine".