11830391 has 4 divisors (see below), whose sum is σ = 12007032. Its totient is φ = 11653752.

The previous prime is 11830387. The next prime is 11830409. The reversal of 11830391 is 19303811.

11830391 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 11830391 - 2² = 11830387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11830391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11830991) 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, 88220 + ... + 88353.

It is an arithmetic number, because the mean of its divisors is an integer number (3001758).

Almost surely, 2^11830391 is an apocalyptic number.

11830391 is a deficient number, since it is larger than the sum of its proper divisors (176641).

11830391 is an equidigital number, since it uses as much as digits as its factorization.

11830391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176640.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 11830391 is about 3439.5335439562. The cubic root of 11830391 is about 227.8590939668.

It can be divided in two parts, 11830 and 391, that added together give a palindrome (12221).

The spelling of 11830391 in words is "eleven million, eight hundred thirty thousand, three hundred ninety-one".