9679817902 has 4 divisors (see below), whose sum is σ = 14519726856. Its totient is φ = 4839908950.

The previous prime is 9679817893. The next prime is 9679817909. The reversal of 9679817902 is 2097189769.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2097189769 = 8317 ⋅252157.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9679817909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2419954474 + ... + 2419954477.

It is an arithmetic number, because the mean of its divisors is an integer number (3629931714).

Almost surely, 2^9679817902 is an apocalyptic number.

9679817902 is a deficient number, since it is larger than the sum of its proper divisors (4839908954).

9679817902 is a wasteful number, since it uses less digits than its factorization.

9679817902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839908953.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The square root of 9679817902 is about 98386.0655885781. The cubic root of 9679817902 is about 2131.1911095351.

The spelling of 9679817902 in words is "nine billion, six hundred seventy-nine million, eight hundred seventeen thousand, nine hundred two".