11866139 has 4 divisors (see below), whose sum is σ = 12067320. Its totient is φ = 11664960.

The previous prime is 11866109. The next prime is 11866157. The reversal of 11866139 is 93166811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93166811 = 31 ⋅3005381.

It is a cyclic number.

It is not a de Polignac number, because 11866139 - 2¹⁶ = 11800603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11866099 and 11866108.

It is not an unprimeable number, because it can be changed into a prime (11866109) 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, 100502 + ... + 100619.

It is an arithmetic number, because the mean of its divisors is an integer number (3016830).

Almost surely, 2^11866139 is an apocalyptic number.

11866139 is a deficient number, since it is larger than the sum of its proper divisors (201181).

11866139 is an equidigital number, since it uses as much as digits as its factorization.

11866139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201180.

The product of its digits is 7776, while the sum is 35.

The square root of 11866139 is about 3444.7262590807. The cubic root of 11866139 is about 228.0883711503.

The spelling of 11866139 in words is "eleven million, eight hundred sixty-six thousand, one hundred thirty-nine".