11857523 has 2 divisors, whose sum is σ = 11857524. Its totient is φ = 11857522.

The previous prime is 11857519. The next prime is 11857529. The reversal of 11857523 is 32575811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11857523 - 2² = 11857519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11857523.

It is not a weakly prime, because it can be changed into another prime (11857529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928761 + 5928762.

It is an arithmetic number, because the mean of its divisors is an integer number (5928762).

Almost surely, 2^11857523 is an apocalyptic number.

11857523 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857523 is an equidigital number, since it uses as much as digits as its factorization.

11857523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 11857523 is about 3443.4754246255. The cubic root of 11857523 is about 228.0331528174.

The spelling of 11857523 in words is "eleven million, eight hundred fifty-seven thousand, five hundred twenty-three".