9291389 has 2 divisors, whose sum is σ = 9291390. Its totient is φ = 9291388.

The previous prime is 9291371. The next prime is 9291391. The reversal of 9291389 is 9831929.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8602489 + 688900 = 2933^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 9291389 - 2¹² = 9287293 is a prime.

Together with 9291391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9291319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4645694 + 4645695.

It is an arithmetic number, because the mean of its divisors is an integer number (4645695).

Almost surely, 2^9291389 is an apocalyptic number.

It is an amenable number.

9291389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9291389 is an equidigital number, since it uses as much as digits as its factorization.

9291389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 41.

The square root of 9291389 is about 3048.1779803679. The cubic root of 9291389 is about 210.2294468709.

The spelling of 9291389 in words is "nine million, two hundred ninety-one thousand, three hundred eighty-nine".