11810857 has 2 divisors, whose sum is σ = 11810858. Its totient is φ = 11810856.

The previous prime is 11810833. The next prime is 11810879. The reversal of 11810857 is 75801811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11806096 + 4761 = 3436^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 11810857 - 2²³ = 3422249 is a prime.

It is equal to p₇₇₆₄₅₂ and since 11810857 and 776452 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11810657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905428 + 5905429.

It is an arithmetic number, because the mean of its divisors is an integer number (5905429).

Almost surely, 2^11810857 is an apocalyptic number.

It is an amenable number.

11810857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11810857 is an equidigital number, since it uses as much as digits as its factorization.

11810857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 11810857 is about 3436.6927415758. The cubic root of 11810857 is about 227.7336134261.

The spelling of 11810857 in words is "eleven million, eight hundred ten thousand, eight hundred fifty-seven".