11523439 has 2 divisors, whose sum is σ = 11523440. Its totient is φ = 11523438.

The previous prime is 11523431. The next prime is 11523461. The reversal of 11523439 is 93432511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11523439 - 2³ = 11523431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11523431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5761719 + 5761720.

It is an arithmetic number, because the mean of its divisors is an integer number (5761720).

Almost surely, 2^11523439 is an apocalyptic number.

11523439 is a deficient number, since it is larger than the sum of its proper divisors (1).

11523439 is an equidigital number, since it uses as much as digits as its factorization.

11523439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 11523439 is about 3394.6191244380. The cubic root of 11523439 is about 225.8711184657.

The spelling of 11523439 in words is "eleven million, five hundred twenty-three thousand, four hundred thirty-nine".