51458989 has 2 divisors, whose sum is σ = 51458990. Its totient is φ = 51458988.

The previous prime is 51458987. The next prime is 51459007. The reversal of 51458989 is 98985415.

51458989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 11957764 = 6285^2 + 3458^2 .

It is a cyclic number.

It is not a de Polignac number, because 51458989 - 2¹ = 51458987 is a prime.

Together with 51458987, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51458987) 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, 25729494 + 25729495.

It is an arithmetic number, because the mean of its divisors is an integer number (25729495).

Almost surely, 2^51458989 is an apocalyptic number.

It is an amenable number.

51458989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51458989 is an equidigital number, since it uses as much as digits as its factorization.

51458989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 49.

The square root of 51458989 is about 7173.4921063594. The cubic root of 51458989 is about 371.9521583559.

The spelling of 51458989 in words is "fifty-one million, four hundred fifty-eight thousand, nine hundred eighty-nine".