11381899 has 2 divisors, whose sum is σ = 11381900. Its totient is φ = 11381898.

The previous prime is 11381879. The next prime is 11381921. The reversal of 11381899 is 99818311.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99818311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11381899 is a prime.

It is not a weakly prime, because it can be changed into another prime (11381869) 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, 5690949 + 5690950.

It is an arithmetic number, because the mean of its divisors is an integer number (5690950).

Almost surely, 2^11381899 is an apocalyptic number.

11381899 is a deficient number, since it is larger than the sum of its proper divisors (1).

11381899 is an equidigital number, since it uses as much as digits as its factorization.

11381899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 40.

The square root of 11381899 is about 3373.7070115824. The cubic root of 11381899 is about 224.9425301782.

The spelling of 11381899 in words is "eleven million, three hundred eighty-one thousand, eight hundred ninety-nine".