11837857 has 4 divisors (see below), whose sum is σ = 12113200. Its totient is φ = 11562516.

The previous prime is 11837827. The next prime is 11837863. The reversal of 11837857 is 75873811.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75873811 = 13 ⋅5836447.

It is a cyclic number.

It is not a de Polignac number, because 11837857 - 2¹¹ = 11835809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11837827) 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, 137607 + ... + 137692.

It is an arithmetic number, because the mean of its divisors is an integer number (3028300).

Almost surely, 2^11837857 is an apocalyptic number.

It is an amenable number.

11837857 is a deficient number, since it is larger than the sum of its proper divisors (275343).

11837857 is an equidigital number, since it uses as much as digits as its factorization.

11837857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275342.

The product of its digits is 47040, while the sum is 40.

The square root of 11837857 is about 3440.6186943630. The cubic root of 11837857 is about 227.9070168195.

The spelling of 11837857 in words is "eleven million, eight hundred thirty-seven thousand, eight hundred fifty-seven".