11388491 has 2 divisors, whose sum is σ = 11388492. Its totient is φ = 11388490.

The previous prime is 11388463. The next prime is 11388493. The reversal of 11388491 is 19488311.

It is a strong prime.

It is an emirp because it is prime and its reverse (19488311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11388491 is a prime.

Together with 11388493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11388493) 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, 5694245 + 5694246.

It is an arithmetic number, because the mean of its divisors is an integer number (5694246).

Almost surely, 2^11388491 is an apocalyptic number.

11388491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11388491 is an equidigital number, since it uses as much as digits as its factorization.

11388491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 11388491 is about 3374.6838370431. The cubic root of 11388491 is about 224.9859480936.

The spelling of 11388491 in words is "eleven million, three hundred eighty-eight thousand, four hundred ninety-one".