51489079 has 2 divisors, whose sum is σ = 51489080. Its totient is φ = 51489078.

The previous prime is 51489059. The next prime is 51489083. The reversal of 51489079 is 97098415.

51489079 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 is a cyclic number.

It is not a de Polignac number, because 51489079 - 2¹¹ = 51487031 is a prime.

It is a super-2 number, since 2×51489079² = 5302250512536482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51489059) 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, 25744539 + 25744540.

It is an arithmetic number, because the mean of its divisors is an integer number (25744540).

Almost surely, 2^51489079 is an apocalyptic number.

51489079 is a deficient number, since it is larger than the sum of its proper divisors (1).

51489079 is an equidigital number, since it uses as much as digits as its factorization.

51489079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 51489079 is about 7175.5891047356. The cubic root of 51489079 is about 372.0246423534.

The spelling of 51489079 in words is "fifty-one million, four hundred eighty-nine thousand, seventy-nine".