9987764507 has 8 divisors (see below), whose sum is σ = 11426279136. Its totient is φ = 8552172672.

The previous prime is 9987764477. The next prime is 9987764569. The reversal of 9987764507 is 7054677899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9987764507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9987764507.

It is not an unprimeable number, because it can be changed into a prime (9987764207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723368 + ... + 737045.

It is an arithmetic number, because the mean of its divisors is an integer number (1428284892).

Almost surely, 2^9987764507 is an apocalyptic number.

9987764507 is a deficient number, since it is larger than the sum of its proper divisors (1438514629).

9987764507 is a wasteful number, since it uses less digits than its factorization.

9987764507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461397.

The product of its (nonzero) digits is 26671680, while the sum is 62.

The square root of 9987764507 is about 99938.8038101317. The cubic root of 9987764507 is about 2153.5556457307. Note that the first 3 decimals are identical.

The spelling of 9987764507 in words is "nine billion, nine hundred eighty-seven million, seven hundred sixty-four thousand, five hundred seven".