17117672987 has 4 divisors (see below), whose sum is σ = 17134572000. Its totient is φ = 17100773976.

The previous prime is 17117672981. The next prime is 17117672993. The reversal of 17117672987 is 78927671171.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (17117672981) and next prime (17117672993).

It is a cyclic number.

It is not a de Polignac number, because 17117672987 - 2⁸ = 17117672731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17117672981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8447987 + ... + 8450012.

It is an arithmetic number, because the mean of its divisors is an integer number (4283643000).

Almost surely, 2^17117672987 is an apocalyptic number.

17117672987 is a deficient number, since it is larger than the sum of its proper divisors (16899013).

17117672987 is a wasteful number, since it uses less digits than its factorization.

17117672987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16899012.

The product of its digits is 2074464, while the sum is 56.

The spelling of 17117672987 in words is "seventeen billion, one hundred seventeen million, six hundred seventy-two thousand, nine hundred eighty-seven".