9787145117 has 4 divisors (see below), whose sum is σ = 9788558076. Its totient is φ = 9785732160.

The previous prime is 9787145111. The next prime is 9787145143. The reversal of 9787145117 is 7115417879.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8749918681 + 1037226436 = 93541^2 + 32206^2 .

It is a cyclic number.

It is not a de Polignac number, because 9787145117 - 2⁴ = 9787145101 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 (9787145111) 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, 696038 + ... + 709959.

It is an arithmetic number, because the mean of its divisors is an integer number (2447139519).

Almost surely, 2^9787145117 is an apocalyptic number.

It is an amenable number.

9787145117 is a deficient number, since it is larger than the sum of its proper divisors (1412959).

9787145117 is a wasteful number, since it uses less digits than its factorization.

9787145117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412958.

The product of its digits is 493920, while the sum is 50.

The square root of 9787145117 is about 98930.0010967351. The cubic root of 9787145117 is about 2139.0388670949.

The spelling of 9787145117 in words is "nine billion, seven hundred eighty-seven million, one hundred forty-five thousand, one hundred seventeen".