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11830991 is a prime number
BaseRepresentation
bin101101001000…
…011011001111
3211021002001212
4231020123033
511012042431
61101325035
7202363454
oct55103317
924232055
1011830991
116750887
123b6677b
1325b30b3
1417dd82b
15108a72b
hexb486cf

11830991 has 2 divisors, whose sum is σ = 11830992. Its totient is φ = 11830990.

The previous prime is 11830967. The next prime is 11831021. The reversal of 11830991 is 19903811.

11830991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11830991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11830921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5915495 + 5915496.

It is an arithmetic number, because the mean of its divisors is an integer number (5915496).

Almost surely, 211830991 is an apocalyptic number.

11830991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11830991 is an equidigital number, since it uses as much as digits as its factorization.

11830991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 11830991 is about 3439.6207639797. The cubic root of 11830991 is about 227.8629459991.

It can be divided in two parts, 11830 and 991, that added together give a palindrome (12821).

The spelling of 11830991 in words is "eleven million, eight hundred thirty thousand, nine hundred ninety-one".