9790991147 has 4 divisors (see below), whose sum is σ = 11189704176. Its totient is φ = 8392278120.

The previous prime is 9790991143. The next prime is 9790991149. The reversal of 9790991147 is 7411990979.

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: 7411990979 = 73 ⋅101534123.

It is a cyclic number.

It is not a de Polignac number, because 9790991147 - 2² = 9790991143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9790991092 and 9790991101.

It is not an unprimeable number, because it can be changed into a prime (9790991143) 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, 699356504 + ... + 699356517.

It is an arithmetic number, because the mean of its divisors is an integer number (2797426044).

Almost surely, 2^9790991147 is an apocalyptic number.

9790991147 is a deficient number, since it is larger than the sum of its proper divisors (1398713029).

9790991147 is a wasteful number, since it uses less digits than its factorization.

9790991147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398713028.

The product of its (nonzero) digits is 1285956, while the sum is 56.

The square root of 9790991147 is about 98949.4373253330. The cubic root of 9790991147 is about 2139.3190213233.

The spelling of 9790991147 in words is "nine billion, seven hundred ninety million, nine hundred ninety-one thousand, one hundred forty-seven".