11381403 has 16 divisors (see below), whose sum is σ = 16649856. Its totient is φ = 6858240.

The previous prime is 11381393. The next prime is 11381413. The reversal of 11381403 is 30418311.

It is an interprime number because it is at equal distance from previous prime (11381393) and next prime (11381413).

It is not a de Polignac number, because 11381403 - 2⁸ = 11381147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11381403.

It is not an unprimeable number, because it can be changed into a prime (11381413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5476 + ... + 7262.

It is an arithmetic number, because the mean of its divisors is an integer number (1040616).

Almost surely, 2^11381403 is an apocalyptic number.

11381403 is a deficient number, since it is larger than the sum of its proper divisors (5268453).

11381403 is a wasteful number, since it uses less digits than its factorization.

11381403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 11381403 is about 3373.6335011379. The cubic root of 11381403 is about 224.9392626181.

Adding to 11381403 its reverse (30418311), we get a palindrome (41799714).

The spelling of 11381403 in words is "eleven million, three hundred eighty-one thousand, four hundred three".