9145889 has 2 divisors, whose sum is σ = 9145890. Its totient is φ = 9145888.

The previous prime is 9145883. The next prime is 9145891. The reversal of 9145889 is 9885419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 966289 = 2860^2 + 983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9145889 is a prime.

Together with 9145891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9145883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572944 + 4572945.

It is an arithmetic number, because the mean of its divisors is an integer number (4572945).

Almost surely, 2^9145889 is an apocalyptic number.

It is an amenable number.

9145889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9145889 is an equidigital number, since it uses as much as digits as its factorization.

9145889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 9145889 is about 3024.2170887686. The cubic root of 9145889 is about 209.1262944008.

The spelling of 9145889 in words is "nine million, one hundred forty-five thousand, eight hundred eighty-nine".