987517389 has 16 divisors (see below), whose sum is σ = 1339243200. Its totient is φ = 647154816.

The previous prime is 987517379. The next prime is 987517409. The reversal of 987517389 is 983715789.

It is not a de Polignac number, because 987517389 - 2¹¹ = 987515341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987517339) 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 in 15 ways as a sum of consecutive naturals, for example, 35502 + ... + 56880.

It is an arithmetic number, because the mean of its divisors is an integer number (83702700).

Almost surely, 2^987517389 is an apocalyptic number.

It is an amenable number.

987517389 is a deficient number, since it is larger than the sum of its proper divisors (351725811).

987517389 is a wasteful number, since it uses less digits than its factorization.

987517389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21644.

The product of its digits is 3810240, while the sum is 57.

The square root of 987517389 is about 31424.7894026356. The cubic root of 987517389 is about 995.8216957556.

The spelling of 987517389 in words is "nine hundred eighty-seven million, five hundred seventeen thousand, three hundred eighty-nine".