11388431 has 2 divisors, whose sum is σ = 11388432. Its totient is φ = 11388430.

The previous prime is 11388413. The next prime is 11388437. The reversal of 11388431 is 13488311.

Together with previous prime (11388413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13488311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11388431 - 2⁶ = 11388367 is a prime.

It is a super-2 number, since 2×11388431² = 259392721283522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11388394 and 11388403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11388437) 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, 5694215 + 5694216.

It is an arithmetic number, because the mean of its divisors is an integer number (5694216).

Almost surely, 2^11388431 is an apocalyptic number.

11388431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11388431 is an equidigital number, since it uses as much as digits as its factorization.

11388431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 11388431 is about 3374.6749473097. The cubic root of 11388431 is about 224.9855529819.

The spelling of 11388431 in words is "eleven million, three hundred eighty-eight thousand, four hundred thirty-one".