987907709791 has 16 divisors (see below), whose sum is σ = 1047896690688. Its totient is φ = 928127894400.

The previous prime is 987907709779. The next prime is 987907709863. The reversal of 987907709791 is 197907709789.

It is a cyclic number.

It is not a de Polignac number, because 987907709791 - 2²³ = 987899321183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987907709771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95068206 + ... + 95078596.

It is an arithmetic number, because the mean of its divisors is an integer number (65493543168).

Almost surely, 2^987907709791 is an apocalyptic number.

987907709791 is a deficient number, since it is larger than the sum of its proper divisors (59988980897).

987907709791 is a wasteful number, since it uses less digits than its factorization.

987907709791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19902.

The product of its (nonzero) digits is 126023688, while the sum is 73.

The spelling of 987907709791 in words is "nine hundred eighty-seven billion, nine hundred seven million, seven hundred nine thousand, seven hundred ninety-one".