11001491 has 2 divisors, whose sum is σ = 11001492. Its totient is φ = 11001490.

The previous prime is 11001451. The next prime is 11001503. The reversal of 11001491 is 19410011.

It is a strong prime.

It is an emirp because it is prime and its reverse (19410011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11001491 - 2⁶ = 11001427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11001451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500745 + 5500746.

It is an arithmetic number, because the mean of its divisors is an integer number (5500746).

Almost surely, 2^11001491 is an apocalyptic number.

11001491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001491 is an equidigital number, since it uses as much as digits as its factorization.

11001491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 11001491 is about 3316.8495594464. The cubic root of 11001491 is about 222.4080569494.

The spelling of 11001491 in words is "eleven million, one thousand, four hundred ninety-one".