985989149 has 2 divisors, whose sum is σ = 985989150. Its totient is φ = 985989148.

The previous prime is 985989143. The next prime is 985989161. The reversal of 985989149 is 941989589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978563524 + 7425625 = 31282^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 985989149 - 2¹² = 985985053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 985989091 and 985989100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985989143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492994574 + 492994575.

It is an arithmetic number, because the mean of its divisors is an integer number (492994575).

Almost surely, 2^985989149 is an apocalyptic number.

It is an amenable number.

985989149 is a deficient number, since it is larger than the sum of its proper divisors (1).

985989149 is an equidigital number, since it uses as much as digits as its factorization.

985989149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 62.

The square root of 985989149 is about 31400.4641526204. The cubic root of 985989149 is about 995.3077334046.

The spelling of 985989149 in words is "nine hundred eighty-five million, nine hundred eighty-nine thousand, one hundred forty-nine".