9491234189 has 2 divisors, whose sum is σ = 9491234190. Its totient is φ = 9491234188.

The previous prime is 9491234171. The next prime is 9491234201. The reversal of 9491234189 is 9814321949.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5000894089 + 4490340100 = 70717^2 + 67010^2 .

It is an emirp because it is prime and its reverse (9814321949) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9491234189 - 2⁸ = 9491233933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9491254189) 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 as a sum of consecutive naturals, namely, 4745617094 + 4745617095.

It is an arithmetic number, because the mean of its divisors is an integer number (4745617095).

Almost surely, 2^9491234189 is an apocalyptic number.

It is an amenable number.

9491234189 is a deficient number, since it is larger than the sum of its proper divisors (1).

9491234189 is an equidigital number, since it uses as much as digits as its factorization.

9491234189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 9491234189 is about 97422.9654085729. The cubic root of 9491234189 is about 2117.2601806341.

The spelling of 9491234189 in words is "nine billion, four hundred ninety-one million, two hundred thirty-four thousand, one hundred eighty-nine".