51659189 has 2 divisors, whose sum is σ = 51659190. Its totient is φ = 51659188.

The previous prime is 51659183. The next prime is 51659203. The reversal of 51659189 is 98195615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 11336689 = 6350^2 + 3367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51659189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51659183) 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, 25829594 + 25829595.

It is an arithmetic number, because the mean of its divisors is an integer number (25829595).

Almost surely, 2^51659189 is an apocalyptic number.

It is an amenable number.

51659189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51659189 is an equidigital number, since it uses as much as digits as its factorization.

51659189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 44.

The square root of 51659189 is about 7187.4327127285. The cubic root of 51659189 is about 372.4338912455.

The spelling of 51659189 in words is "fifty-one million, six hundred fifty-nine thousand, one hundred eighty-nine".