9145479391 has 2 divisors, whose sum is σ = 9145479392. Its totient is φ = 9145479390.

The previous prime is 9145479373. The next prime is 9145479451. The reversal of 9145479391 is 1939745419.

9145479391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9145479391 - 2⁵ = 9145479359 is a prime.

It is a super-3 number, since 3×9145479391³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9145479331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572739695 + 4572739696.

It is an arithmetic number, because the mean of its divisors is an integer number (4572739696).

Almost surely, 2^9145479391 is an apocalyptic number.

9145479391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9145479391 is an equidigital number, since it uses as much as digits as its factorization.

9145479391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The square root of 9145479391 is about 95631.9998274636. Note that the first 3 decimals coincide. The cubic root of 9145479391 is about 2091.2317236818.

The spelling of 9145479391 in words is "nine billion, one hundred forty-five million, four hundred seventy-nine thousand, three hundred ninety-one".