11431139 has 2 divisors, whose sum is σ = 11431140. Its totient is φ = 11431138.

The previous prime is 11431129. The next prime is 11431151. The reversal of 11431139 is 93113411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11431139 - 2⁸ = 11430883 is a prime.

It is not a weakly prime, because it can be changed into another prime (11431109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715569 + 5715570.

It is an arithmetic number, because the mean of its divisors is an integer number (5715570).

Almost surely, 2^11431139 is an apocalyptic number.

11431139 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431139 is an equidigital number, since it uses as much as digits as its factorization.

11431139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 11431139 is about 3380.9967465231. The cubic root of 11431139 is about 225.2664432033.

The spelling of 11431139 in words is "eleven million, four hundred thirty-one thousand, one hundred thirty-nine".