11408381 has 2 divisors, whose sum is σ = 11408382. Its totient is φ = 11408380.

The previous prime is 11408359. The next prime is 11408389. The reversal of 11408381 is 18380411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 1136356 = 3205^2 + 1066^2 .

It is a cyclic number.

It is not a de Polignac number, because 11408381 - 2⁶ = 11408317 is a prime.

It is a super-2 number, since 2×11408381² = 260302314082322, which contains 22 as substring.

It is equal to p₇₅₁₆₄₃ and since 11408381 and 751643 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11408381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11408389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5704190 + 5704191.

It is an arithmetic number, because the mean of its divisors is an integer number (5704191).

Almost surely, 2^11408381 is an apocalyptic number.

It is an amenable number.

11408381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11408381 is an equidigital number, since it uses as much as digits as its factorization.

11408381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 11408381 is about 3377.6294941867. The cubic root of 11408381 is about 225.1168512383.

Adding to 11408381 its reverse (18380411), we get a palindrome (29788792).

The spelling of 11408381 in words is "eleven million, four hundred eight thousand, three hundred eighty-one".