11900857 has 4 divisors (see below), whose sum is σ = 11929680. Its totient is φ = 11872036.

The previous prime is 11900849. The next prime is 11900887. The reversal of 11900857 is 75800911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11900857 - 2³ = 11900849 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11900887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13783 + ... + 14620.

It is an arithmetic number, because the mean of its divisors is an integer number (2982420).

Almost surely, 2^11900857 is an apocalyptic number.

It is an amenable number.

11900857 is a deficient number, since it is larger than the sum of its proper divisors (28823).

11900857 is an equidigital number, since it uses as much as digits as its factorization.

11900857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28822.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 11900857 is about 3449.7618758401. The cubic root of 11900857 is about 228.3106018656.

The spelling of 11900857 in words is "eleven million, nine hundred thousand, eight hundred fifty-seven".