9045391 has 2 divisors, whose sum is σ = 9045392. Its totient is φ = 9045390.

The previous prime is 9045389. The next prime is 9045409. The reversal of 9045391 is 1935409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9045391 - 2¹ = 9045389 is a prime.

Together with 9045389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9045301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4522695 + 4522696.

It is an arithmetic number, because the mean of its divisors is an integer number (4522696).

Almost surely, 2^9045391 is an apocalyptic number.

9045391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9045391 is an equidigital number, since it uses as much as digits as its factorization.

9045391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 9045391 is about 3007.5556520204. Note that the first 3 decimals coincide. The cubic root of 9045391 is about 208.3574889680.

The spelling of 9045391 in words is "nine million, forty-five thousand, three hundred ninety-one".