9491513197 has 4 divisors (see below), whose sum is σ = 9647111836. Its totient is φ = 9335914560.

The previous prime is 9491513179. The next prime is 9491513231. The reversal of 9491513197 is 7913151949.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7913151949 = 19819 ⋅399271.

It can be written as a sum of positive squares in 2 ways, for example, as 224370441 + 9267142756 = 14979^2 + 96266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9491513197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9491513197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9491513107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77799228 + ... + 77799349.

It is an arithmetic number, because the mean of its divisors is an integer number (2411777959).

Almost surely, 2^9491513197 is an apocalyptic number.

It is an amenable number.

9491513197 is a deficient number, since it is larger than the sum of its proper divisors (155598639).

9491513197 is a wasteful number, since it uses less digits than its factorization.

9491513197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155598638.

The product of its digits is 306180, while the sum is 49.

The square root of 9491513197 is about 97424.3973396808. The cubic root of 9491513197 is about 2117.2809270312.

The spelling of 9491513197 in words is "nine billion, four hundred ninety-one million, five hundred thirteen thousand, one hundred ninety-seven".