917009107987 has 8 divisors (see below), whose sum is σ = 1072382744576. Its totient is φ = 767728555272.

The previous prime is 917009107957. The next prime is 917009108023. The reversal of 917009107987 is 789701900719.

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

It is not a de Polignac number, because 917009107987 - 2³⁵ = 882649369619 is a prime.

It is a super-2 number, since 2×917009107987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (917009107957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1523270643 + ... + 1523271244.

It is an arithmetic number, because the mean of its divisors is an integer number (134047843072).

Almost surely, 2^917009107987 is an apocalyptic number.

917009107987 is a deficient number, since it is larger than the sum of its proper divisors (155373636589).

917009107987 is a wasteful number, since it uses less digits than its factorization.

917009107987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046541937.

The product of its (nonzero) digits is 2000376, while the sum is 58.

The spelling of 917009107987 in words is "nine hundred seventeen billion, nine million, one hundred seven thousand, nine hundred eighty-seven".