51985079 has 2 divisors, whose sum is σ = 51985080. Its totient is φ = 51985078.

The previous prime is 51985069. The next prime is 51985097. The reversal of 51985079 is 97058915.

It is a happy number.

Together with next prime (51985097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51985079 - 2²⁴ = 35207863 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51985019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25992539 + 25992540.

It is an arithmetic number, because the mean of its divisors is an integer number (25992540).

Almost surely, 2^51985079 is an apocalyptic number.

51985079 is a deficient number, since it is larger than the sum of its proper divisors (1).

51985079 is an equidigital number, since it uses as much as digits as its factorization.

51985079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 51985079 is about 7210.0678914973. The cubic root of 51985079 is about 373.2154117544.

The spelling of 51985079 in words is "fifty-one million, nine hundred eighty-five thousand, seventy-nine".