9491220473 has 12 divisors (see below), whose sum is σ = 11042402292. Its totient is φ = 8134156800.

The previous prime is 9491220463. The next prime is 9491220491. The reversal of 9491220473 is 3740221949.

It can be written as a sum of positive squares in 2 ways, for example, as 9175340944 + 315879529 = 95788^2 + 17773^2 .

It is not a de Polignac number, because 9491220473 - 2⁸ = 9491220217 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 9491220473.

It is not an unprimeable number, because it can be changed into a prime (9491220463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608573 + ... + 623973.

It is an arithmetic number, because the mean of its divisors is an integer number (920200191).

Almost surely, 2^9491220473 is an apocalyptic number.

It is an amenable number.

9491220473 is a deficient number, since it is larger than the sum of its proper divisors (1551181819).

9491220473 is a wasteful number, since it uses less digits than its factorization.

9491220473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27992 (or 27985 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 9491220473 is about 97422.8950144677. The cubic root of 9491220473 is about 2117.2591607332.

The spelling of 9491220473 in words is "nine billion, four hundred ninety-one million, two hundred twenty thousand, four hundred seventy-three".