11831857 has 2 divisors, whose sum is σ = 11831858. Its totient is φ = 11831856.

The previous prime is 11831849. The next prime is 11831861. The reversal of 11831857 is 75813811.

11831857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11029041 + 802816 = 3321^2 + 896^2 .

It is an emirp because it is prime and its reverse (75813811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11831857 - 2³ = 11831849 is a prime.

It is not a weakly prime, because it can be changed into another prime (11831557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5915928 + 5915929.

It is an arithmetic number, because the mean of its divisors is an integer number (5915929).

Almost surely, 2^11831857 is an apocalyptic number.

It is an amenable number.

11831857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11831857 is an equidigital number, since it uses as much as digits as its factorization.

11831857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 34.

The square root of 11831857 is about 3439.7466476472. The cubic root of 11831857 is about 227.8685055361.

The spelling of 11831857 in words is "eleven million, eight hundred thirty-one thousand, eight hundred fifty-seven".