987715729 has 16 divisors (see below), whose sum is σ = 1326165120. Its totient is φ = 710444160.

The previous prime is 987715717. The next prime is 987715739. The reversal of 987715729 is 927517789.

It is a cyclic number.

It is not a de Polignac number, because 987715729 - 2⁵ = 987715697 is a prime.

It is a super-2 number, since 2×987715729² = 1951164722628002882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 987715729.

It is not an unprimeable number, because it can be changed into a prime (987715709) 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, 492364 + ... + 494365.

It is an arithmetic number, because the mean of its divisors is an integer number (82885320).

Almost surely, 2^987715729 is an apocalyptic number.

It is an amenable number.

987715729 is a deficient number, since it is larger than the sum of its proper divisors (338449391).

987715729 is a wasteful number, since it uses less digits than its factorization.

987715729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986760.

The product of its digits is 2222640, while the sum is 55.

The square root of 987715729 is about 31427.9450330434. The cubic root of 987715729 is about 995.8883605913. Note that the first 3 decimals are identical.

The spelling of 987715729 in words is "nine hundred eighty-seven million, seven hundred fifteen thousand, seven hundred twenty-nine".