9191464081 has 2 divisors, whose sum is σ = 9191464082. Its totient is φ = 9191464080.

The previous prime is 9191464063. The next prime is 9191464109. The reversal of 9191464081 is 1804641919.

9191464081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8875335681 + 316128400 = 94209^2 + 17780^2 .

It is a cyclic number.

It is not a de Polignac number, because 9191464081 - 2¹⁷ = 9191333009 is a prime.

It is a super-3 number, since 3×9191464081³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (9191464021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595732040 + 4595732041.

It is an arithmetic number, because the mean of its divisors is an integer number (4595732041).

Almost surely, 2^9191464081 is an apocalyptic number.

It is an amenable number.

9191464081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9191464081 is an equidigital number, since it uses as much as digits as its factorization.

9191464081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 9191464081 is about 95872.1235865776. The cubic root of 9191464081 is about 2094.7308628353.

The spelling of 9191464081 in words is "nine billion, one hundred ninety-one million, four hundred sixty-four thousand, eighty-one".