11867431 has 2 divisors, whose sum is σ = 11867432. Its totient is φ = 11867430.

The previous prime is 11867413. The next prime is 11867447. The reversal of 11867431 is 13476811.

11867431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (11867413) 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 (13476811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11867431 - 2¹¹ = 11865383 is a prime.

It is a super-2 number, since 2×11867431² = 281671837079522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11867393 and 11867402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11867131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5933715 + 5933716.

It is an arithmetic number, because the mean of its divisors is an integer number (5933716).

Almost surely, 2^11867431 is an apocalyptic number.

11867431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11867431 is an equidigital number, since it uses as much as digits as its factorization.

11867431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 11867431 is about 3444.9137870199. The cubic root of 11867431 is about 228.0966490319.

The spelling of 11867431 in words is "eleven million, eight hundred sixty-seven thousand, four hundred thirty-one".