51984089 has 2 divisors, whose sum is σ = 51984090. Its totient is φ = 51984088.

The previous prime is 51984083. The next prime is 51984109. The reversal of 51984089 is 98048915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33640000 + 18344089 = 5800^2 + 4283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51984089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51984083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25992044 + 25992045.

It is an arithmetic number, because the mean of its divisors is an integer number (25992045).

Almost surely, 2^51984089 is an apocalyptic number.

It is an amenable number.

51984089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51984089 is an equidigital number, since it uses as much as digits as its factorization.

51984089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 51984089 is about 7209.9992371706. Note that the first 3 decimals coincide. The cubic root of 51984089 is about 373.2130425771.

The spelling of 51984089 in words is "fifty-one million, nine hundred eighty-four thousand, eighty-nine".