9240391 has 4 divisors (see below), whose sum is σ = 9414792. Its totient is φ = 9065992.

The previous prime is 9240383. The next prime is 9240409. The reversal of 9240391 is 1930429.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9240391 - 2³ = 9240383 is a prime.

It is a Duffinian number.

9240391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9240311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87121 + ... + 87226.

It is an arithmetic number, because the mean of its divisors is an integer number (2353698).

Almost surely, 2^9240391 is an apocalyptic number.

9240391 is a deficient number, since it is larger than the sum of its proper divisors (174401).

9240391 is a wasteful number, since it uses less digits than its factorization.

9240391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174400.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9240391 is about 3039.8011448119. The cubic root of 9240391 is about 209.8441095513.

The spelling of 9240391 in words is "nine million, two hundred forty thousand, three hundred ninety-one".