11279431 has 2 divisors, whose sum is σ = 11279432. Its totient is φ = 11279430.

The previous prime is 11279423. The next prime is 11279441. The reversal of 11279431 is 13497211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11279431 - 2³ = 11279423 is a prime.

It is a super-2 number, since 2×11279431² = 254451127367522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11279431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11279441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5639715 + 5639716.

It is an arithmetic number, because the mean of its divisors is an integer number (5639716).

Almost surely, 2^11279431 is an apocalyptic number.

11279431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11279431 is an equidigital number, since it uses as much as digits as its factorization.

11279431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 11279431 is about 3358.4864150388. The cubic root of 11279431 is about 224.2654630701.

The spelling of 11279431 in words is "eleven million, two hundred seventy-nine thousand, four hundred thirty-one".