985520149 has 2 divisors, whose sum is σ = 985520150. Its totient is φ = 985520148.

The previous prime is 985520131. The next prime is 985520189. The reversal of 985520149 is 941025589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696009924 + 289510225 = 26382^2 + 17015^2 .

It is a cyclic number.

It is not a de Polignac number, because 985520149 - 2²⁵ = 951965717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985520119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492760074 + 492760075.

It is an arithmetic number, because the mean of its divisors is an integer number (492760075).

Almost surely, 2^985520149 is an apocalyptic number.

It is an amenable number.

985520149 is a deficient number, since it is larger than the sum of its proper divisors (1).

985520149 is an equidigital number, since it uses as much as digits as its factorization.

985520149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 985520149 is about 31392.9952218644. The cubic root of 985520149 is about 995.1498975365.

The spelling of 985520149 in words is "nine hundred eighty-five million, five hundred twenty thousand, one hundred forty-nine".