51298439 has 2 divisors, whose sum is σ = 51298440. Its totient is φ = 51298438.

The previous prime is 51298433. The next prime is 51298447. The reversal of 51298439 is 93489215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51298439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51298396 and 51298405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51298433) 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, 25649219 + 25649220.

It is an arithmetic number, because the mean of its divisors is an integer number (25649220).

Almost surely, 2^51298439 is an apocalyptic number.

51298439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51298439 is an equidigital number, since it uses as much as digits as its factorization.

51298439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 51298439 is about 7162.2928591339. The cubic root of 51298439 is about 371.5649300481.

The spelling of 51298439 in words is "fifty-one million, two hundred ninety-eight thousand, four hundred thirty-nine".