9398478787 has 4 divisors (see below), whose sum is σ = 9415352736. Its totient is φ = 9381604840.

The previous prime is 9398478773. The next prime is 9398478829. The reversal of 9398478787 is 7878748939.

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

It is a cyclic number.

It is not a de Polignac number, because 9398478787 - 2¹⁵ = 9398446019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9398478487) 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, 8436139 + ... + 8437252.

It is an arithmetic number, because the mean of its divisors is an integer number (2353838184).

Almost surely, 2^9398478787 is an apocalyptic number.

9398478787 is a deficient number, since it is larger than the sum of its proper divisors (16873949).

9398478787 is a wasteful number, since it uses less digits than its factorization.

9398478787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16873948.

The product of its digits is 170698752, while the sum is 70.

The square root of 9398478787 is about 96945.7517738658. The cubic root of 9398478787 is about 2110.3404425856.

The spelling of 9398478787 in words is "nine billion, three hundred ninety-eight million, four hundred seventy-eight thousand, seven hundred eighty-seven".