9873650991 has 8 divisors (see below), whose sum is σ = 13380685744. Its totient is φ = 6474525120.

The previous prime is 9873650977. The next prime is 9873650999. The reversal of 9873650991 is 1990563789.

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

It is not a de Polignac number, because 9873650991 - 2⁵ = 9873650959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9873650999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26977006 + ... + 26977371.

It is an arithmetic number, because the mean of its divisors is an integer number (1672585718).

Almost surely, 2^9873650991 is an apocalyptic number.

9873650991 is a deficient number, since it is larger than the sum of its proper divisors (3507034753).

9873650991 is a wasteful number, since it uses less digits than its factorization.

9873650991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53954441.

The product of its (nonzero) digits is 3674160, while the sum is 57.

The square root of 9873650991 is about 99366.2467390210. The cubic root of 9873650991 is about 2145.3225148472.

The spelling of 9873650991 in words is "nine billion, eight hundred seventy-three million, six hundred fifty thousand, nine hundred ninety-one".