987838149 has 12 divisors (see below), whose sum is σ = 1320891936. Its totient is φ = 656675712.

The previous prime is 987838147. The next prime is 987838153. The reversal of 987838149 is 941838789.

It is not a de Polignac number, because 987838149 - 2¹ = 987838147 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987838141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1358424 + ... + 1359150.

It is an arithmetic number, because the mean of its divisors is an integer number (110074328).

Almost surely, 2^987838149 is an apocalyptic number.

It is an amenable number.

987838149 is a deficient number, since it is larger than the sum of its proper divisors (333053787).

987838149 is an frugal number, since it uses more digits than its factorization.

987838149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076 (or 1403 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 987838149 is about 31429.8926024255. The cubic root of 987838149 is about 995.9295032038.

The spelling of 987838149 in words is "nine hundred eighty-seven million, eight hundred thirty-eight thousand, one hundred forty-nine".