9144391 has 2 divisors, whose sum is σ = 9144392. Its totient is φ = 9144390.

The previous prime is 9144389. The next prime is 9144397. The reversal of 9144391 is 1934419.

It is a weak prime.

It is an emirp because it is prime and its reverse (1934419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9144391 - 2¹ = 9144389 is a prime.

Together with 9144389, 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 (9144397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572195 + 4572196.

It is an arithmetic number, because the mean of its divisors is an integer number (4572196).

Almost surely, 2^9144391 is an apocalyptic number.

9144391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9144391 is an equidigital number, since it uses as much as digits as its factorization.

9144391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 9144391 is about 3023.9694112210. The cubic root of 9144391 is about 209.1148762181.

It can be divided in two parts, 9 and 144391, that added together give a square (144400 = 380²).

The spelling of 9144391 in words is "nine million, one hundred forty-four thousand, three hundred ninety-one".