11927857 has 2 divisors, whose sum is σ = 11927858. Its totient is φ = 11927856.

The previous prime is 11927849. The next prime is 11927873. The reversal of 11927857 is 75872911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7017201 + 4910656 = 2649^2 + 2216^2 .

It is an emirp because it is prime and its reverse (75872911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11927857 - 2³ = 11927849 is a prime.

It is a super-2 number, since 2×11927857² = 284547545224898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11927827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5963928 + 5963929.

It is an arithmetic number, because the mean of its divisors is an integer number (5963929).

Almost surely, 2^11927857 is an apocalyptic number.

It is an amenable number.

11927857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11927857 is an equidigital number, since it uses as much as digits as its factorization.

11927857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 40.

The square root of 11927857 is about 3453.6729723586. The cubic root of 11927857 is about 228.4831309060.

The spelling of 11927857 in words is "eleven million, nine hundred twenty-seven thousand, eight hundred fifty-seven".