9121439 has 2 divisors, whose sum is σ = 9121440. Its totient is φ = 9121438.

The previous prime is 9121433. The next prime is 9121493. The reversal of 9121439 is 9341219.

It is a happy number.

9121439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (9121493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9121439 - 2⁸ = 9121183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9121433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560719 + 4560720.

It is an arithmetic number, because the mean of its divisors is an integer number (4560720).

Almost surely, 2^9121439 is an apocalyptic number.

9121439 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121439 is an equidigital number, since it uses as much as digits as its factorization.

9121439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 9121439 is about 3020.1720149687. The cubic root of 9121439 is about 208.9397734021.

The spelling of 9121439 in words is "nine million, one hundred twenty-one thousand, four hundred thirty-nine".